Merge branch 'refs/heads/master' into template-engines

12 years ago · d40776efd9
74 changed files with 4698 additions and 3356 deletions
--- a/app/assets/.gitignore
+++ b/app/assets/.gitignore
@ -0,0 +1 @@
 *
--- a/app/index.php
+++ b/app/index.php
@ -0,0 +1,9 @@
 <?php
 defined('YII_DEBUG') or define('YII_DEBUG', true);
 require(__DIR__ . '/../framework/yii.php');
 $config = require(__DIR__ . '/protected/config/main.php');
 $application = new yii\web\Application($config);
 $application->run();
--- a/app/protected/config/main.php
+++ b/app/protected/config/main.php
@ -0,0 +1,15 @@
 <?php
 return array(
 	'id' => 'hello',
 	'basePath' => dirname(__DIR__),
 	'components' => array(
 		'cache' => array(
 			'class' => 'yii\caching\FileCache',
 		),
 		'user' => array(
 			'class' => 'yii\web\User',
 			'identityClass' => 'app\models\User',
 		)
 	),
 );
--- a/app/protected/controllers/SiteController.php
+++ b/app/protected/controllers/SiteController.php
@ -0,0 +1,22 @@
 <?php
 class SiteController extends \yii\web\Controller
 {
 	public function actionIndex()
 	{
 		echo $this->render('index');
 	}
 	public function actionLogin()
 	{
 		$user = app\models\User::findIdentity(100);
 		Yii::$app->getUser()->login($user);
 		Yii::$app->getResponse()->redirect(array('site/index'));
 	}
 	public function actionLogout()
 	{
 		Yii::$app->getUser()->logout();
 		Yii::$app->getResponse()->redirect(array('site/index'));
 	}
 }
--- a/app/protected/models/User.php
+++ b/app/protected/models/User.php
@ -0,0 +1,43 @@
 <?php
 namespace app\models;
 class User extends \yii\base\Object implements \yii\web\Identity
 {
 	public $id;
 	public $name;
 	public $authKey;
 	private static $users = array(
 		'100' => array(
 			'id' => '100',
 			'authKey' => 'test100key',
 			'name' => 'admin',
 		),
 		'101' => array(
 			'id' => '101',
 			'authKey' => 'test101key',
 			'name' => 'demo',
 		),
 	);
 	public static function findIdentity($id)
 	{
 		return isset(self::$users[$id]) ? new self(self::$users[$id]) : null;
 	}
 	public function getId()
 	{
 		return $this->id;
 	}
 	public function getAuthKey()
 	{
 		return $this->authKey;
 	}
 	public function validateAuthKey($authKey)
 	{
 		return $this->authKey === $authKey;
 	}
 }
--- a/app/protected/runtime/.gitignore
+++ b/app/protected/runtime/.gitignore
@ -0,0 +1 @@
 *
--- a/app/protected/views/layouts/main.php
+++ b/app/protected/views/layouts/main.php
@ -0,0 +1,22 @@
 <?php
 /**
 * @var $this \yii\base\View
 * @var $content string
 */
 use yii\helpers\Html;
 ?>
 <!DOCTYPE html>
 <html>
 <?php $this->beginPage(); ?>
 <head>
 	<title><?php echo Html::encode($this->title); ?></title>
 	<?php $this->head(); ?>
 </head>
 <body>
 <h1>Welcome</h1>
 <?php $this->beginBody(); ?>
 <?php echo $content; ?>
 <?php $this->endBody(); ?>
 </body>
 <?php $this->endPage(); ?>
 </html>
--- a/app/protected/views/site/index.php
+++ b/app/protected/views/site/index.php
@ -0,0 +1,17 @@
 <?php
 /** @var $this \yii\base\View */
 use yii\helpers\Html;
 $this->title = 'Hello World';
 $user = Yii::$app->getUser();
 if ($user->isGuest) {
 	echo Html::a('login', array('login'));
 } else {
 	echo "You are logged in as " . $user->identity->name . "<br/>";
 	echo Html::a('logout', array('logout'));
 }
 ?>
--- a/framework/YiiBase.php
+++ b/framework/YiiBase.php
@ -7,6 +7,7 @@
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
 use yii\base\InvalidParamException;
 use yii\base\UnknownClassException;
 use yii\logging\Logger;
 /**
@ -54,13 +55,10 @@ class YiiBase
 	 */
 	public static $classMap = array();
 	/**
-	 * @var array list of directories where Yii will search for new classes to be included.
+	 * @var boolean whether to search PHP include_path when autoloading unknown classes.
-	 * The first directory in the array will be searched first, and so on.
+	 * You may want to turn this off if you are also using autoloaders from other libraries.
 	 * This property mainly affects how [[autoload]] works.
 	 * @see import
 	 * @see autoload
 	 */
-	public static $classPath = array();
+	public static $enableIncludePath = true;
 	/**
 	 * @var yii\console\Application|yii\web\Application the application instance
 	 */
@ -107,88 +105,86 @@ class YiiBase
 	}
 	/**
-	 * Imports a class or a directory.
+	 * Imports a class by its alias.
-	 *
+	 *
-	 * Importing a class is like including the corresponding class file.
+	 * This method is provided to support autoloading of non-namespaced classes.
-	 * The main difference is that importing a class is much lighter because it only
+	 * Such a class can be specified in terms of an alias. For example, the alias `@old/code/Sample`
-	 * includes the class file when the class is referenced in the code the first time.
+	 * may represent the `Sample` class under the directory `@old/code` (a path alias).
-	 *
+	 *
-	 * Importing a directory will add the directory to the front of the [[classPath]] array.
+	 * By importing a class, the class is put in an internal storage such that when
-	 * When [[autoload()]] is loading an unknown class, it will search in the directories
+	 * the class is used for the first time, the class autoloader will be able to
-	 * specified in [[classPath]] to find the corresponding class file to include.
+	 * find the corresponding class file and include it. For this reason, this method
-	 * For this reason, if multiple directories are imported, the directories imported later
+	 * is much lighter than `include()`.
-	 * will take precedence in class file searching.
+	 *
-	 *
+	 * You may import the same class multiple times. Only the first importing will count.
-	 * The same class or directory can be imported multiple times. Only the first importing
+	 *
-	 * will count. Importing a directory does not import any of its subdirectories.
+	 * @param string $alias the class to be imported. This may be either a class alias or a fully-qualified class name.
-	 *
+	 * If the latter, it will be returned back without change.
-	 * To import a class or a directory, one can use either path alias or class name (can be namespaced):
+	 * @return string the actual class name that `$alias` refers to
-	 *
+	 * @throws Exception if the alias is invalid
 	 *  - `@app/components/GoogleMap`: importing the `GoogleMap` class with a path alias;
 	 *  - `@app/components/*`: importing the whole `components` directory with a path alias;
 	 *  - `GoogleMap`: importing the `GoogleMap` class with a class name. [[autoload()]] will be used
 	 *  when this class is used for the first time.
 	 *
 	 * @param string $alias path alias or a simple class name to be imported
 	 * @param boolean $forceInclude whether to include the class file immediately. If false, the class file
 	 * will be included only when the class is being used. This parameter is used only when
 	 * the path alias refers to a class.
 	 * @return string the class name or the directory that this alias refers to
 	 * @throws Exception if the path alias is invalid
 	 */
-	public static function import($alias, $forceInclude = false)
+	public static function import($alias)
 	{
-		if (isset(self::$_imported[$alias])) {
+		if (strncmp($alias, '@', 1)) {
 			return self::$_imported[$alias];
 		}
 		if ($alias[0] !== '@') {
 			// a simple class name
 			if (class_exists($alias, false) || interface_exists($alias, false)) {
 				return self::$_imported[$alias] = $alias;
 			}
 			if ($forceInclude && static::autoload($alias)) {
 				self::$_imported[$alias] = $alias;
 			}
 			return $alias;
-		}
+		} else {
-
+			$alias = static::getAlias($alias);
 			if (!isset(self::$_imported[$alias])) {
 				$className = basename($alias);
-		$isClass = $className !== '*';
+				self::$_imported[$alias] = $className;
-
+				self::$classMap[$className] = $alias . '.php';
-		if ($isClass && (class_exists($className, false) || interface_exists($className, false))) {
+			}
-			return self::$_imported[$alias] = $className;
+			return self::$_imported[$alias];
 		}
 	}
-		$path = static::getAlias(dirname($alias));
+	/**
-
+	 * Imports a set of namespaces.
-		if ($isClass) {
+	 *
-			if ($forceInclude) {
+	 * By importing a namespace, the method will create an alias for the directory corresponding
-				require($path . "/$className.php");
+	 * to the namespace. For example, if "foo\bar" is a namespace associated with the directory
-				self::$_imported[$alias] = $className;
+	 * "path/to/foo/bar", then an alias "@foo/bar" will be created for this directory.
-			} else {
+	 *
-				self::$classMap[$className] = $path . DIRECTORY_SEPARATOR . "$className.php";
+	 * This method is typically invoked in the bootstrap file to import the namespaces of
 	 * the installed extensions. By default, Composer, when installing new extensions, will
 	 * generate such a mapping file which can be loaded and passed to this method.
 	 *
 	 * @param array $namespaces the namespaces to be imported. The keys are the namespaces,
 	 * and the values are the corresponding directories.
 	 */
 	public static function importNamespaces($namespaces)
 	{
 		foreach ($namespaces as $name => $path) {
 			if ($name !== '') {
 				$name = '@' . str_replace('\\', '/', $name);
 				static::setAlias($name, $path);
 			}
 			return $className;
 		} else {
 			// a directory
 			array_unshift(self::$classPath, $path);
 			return self::$_imported[$alias] = $path;
 		}
 	}
 	/**
 	 * Translates a path alias into an actual path.
 	 *
-	 * The path alias can be either a root alias registered via [[setAlias]] or an
+	 * The translation is done according to the following procedure:
-	 * alias starting with a root alias (e.g. `@yii/base/Component.php`).
+	 *
-	 * In the latter case, the root alias will be replaced by the corresponding registered path
+	 * 1. If the given alias does not start with '@', it is returned back without change;
-	 * and the remaining part will be appended to it.
+	 * 2. Otherwise, look for the longest registered alias that matches the beginning part
 	 *    of the given alias. If it exists, replace the matching part of the given alias with
 	 *    the corresponding registered path.
 	 * 3. Throw an exception or return false, depending on the `$throwException` parameter.
 	 *
 	 * For example, by default '@yii' is registered as the alias to the Yii framework directory,
 	 * say '/path/to/yii'. The alias '@yii/web' would then be translated into '/path/to/yii/web'.
 	 *
-	 * In case the given parameter is not an alias (i.e., not starting with '@'),
+	 * If you have registered two aliases '@foo' and '@foo/bar'. Then translating '@foo/bar/config'
-	 * it will be returned back without change.
+	 * would replace the part '@foo/bar' (instead of '@foo') with the corresponding registered path.
 	 * This is because the longest alias takes precedence.
 	 *
 	 * However, if the alias to be translated is '@foo/barbar/config', then '@foo' will be replaced
 	 * instead of '@foo/bar', because '/' serves as the boundary character.
 	 *
 	 * Note, this method does not check if the returned path exists or not.
 	 *
 	 * Note, this method does not ensure the existence of the resulting path.
 	 * @param string $alias the alias to be translated.
 	 * @param boolean $throwException whether to throw an exception if the given alias is invalid.
 	 * If this is false and an invalid alias is given, false will be returned by this method.
@ -198,18 +194,26 @@ class YiiBase
 	 */
 	public static function getAlias($alias, $throwException = true)
 	{
-		if (is_string($alias)) {
+		if (strncmp($alias, '@', 1)) {
-			if (isset(self::$aliases[$alias])) {
+			// not an alias
 				return self::$aliases[$alias];
 			} elseif ($alias === '' || $alias[0] !== '@') { // not an alias
 			return $alias;
-			} elseif (($pos = strpos($alias, '/')) !== false || ($pos = strpos($alias, '\\')) !== false) {
+		}
-				$rootAlias = substr($alias, 0, $pos);
+
-				if (isset(self::$aliases[$rootAlias])) {
+		$pos = strpos($alias, '/');
-					return self::$aliases[$alias] = self::$aliases[$rootAlias] . substr($alias, $pos);
+		$root = $pos === false ? $alias : substr($alias, 0, $pos);
 		if (isset(self::$aliases[$root])) {
 			if (is_string(self::$aliases[$root])) {
 				return $pos === false ? self::$aliases[$root] : self::$aliases[$root] . substr($alias, $pos);
 			} else {
 				foreach (self::$aliases[$root] as $name => $path) {
 					if (strpos($alias . '/', $name . '/') === 0) {
 						return $path . substr($alias, strlen($name));
 					}
 				}
 			}
 		}
 		if ($throwException) {
 			throw new InvalidParamException("Invalid path alias: $alias");
 		} else {
@ -218,41 +222,96 @@ class YiiBase
 	}
 	/**
 	 * Returns the root alias part of a given alias.
 	 * A root alias is an alias that has been registered via [[setAlias()]] previously.
 	 * If a given alias matches multiple root aliases, the longest one will be returned.
 	 * @param string $alias the alias
 	 * @return string|boolean the root alias, or false if no root alias is found
 	 */
 	public static function getRootAlias($alias)
 	{
 		$pos = strpos($alias, '/');
 		$root = $pos === false ? $alias : substr($alias, 0, $pos);
 		if (isset(self::$aliases[$root])) {
 			if (is_string(self::$aliases[$root])) {
 				return $root;
 			} else {
 				foreach (self::$aliases[$root] as $name => $path) {
 					if (strpos($alias . '/', $name . '/') === 0) {
 						return $name;
 					}
 				}
 			}
 		}
 		return false;
 	}
 	/**
 	 * Registers a path alias.
 	 *
-	 * A path alias is a short name representing a path (a file path, a URL, etc.)
+	 * A path alias is a short name representing a long path (a file path, a URL, etc.)
-	 * A path alias must start with '@' (e.g. '@yii').
+	 * For example, we use '@yii' as the alias of the path to the Yii framework directory.
 	 *
 	 * A path alias must start with the character '@' so that it can be easily differentiated
 	 * from non-alias paths.
 	 *
 	 * Note that this method does not check if the given path exists or not. All it does is
 	 * to associate the alias with the path.
 	 *
-	 * Note that this method neither checks the existence of the path nor normalizes the path.
+	 * Any trailing '/' and '\' characters in the given path will be trimmed.
 	 * Any trailing '/' and '\' characters in the path will be trimmed.
 	 *
-	 * @param string $alias the alias name (e.g. "@yii"). It should start with a '@' character
+	 * @param string $alias the alias name (e.g. "@yii"). It must start with a '@' character.
-	 * and should NOT contain the forward slash "/" or the backward slash "\".
+	 * It may contain the forward slash '/' which serves as boundary character when performing
-	 * @param string $path the path corresponding to the alias. This can be
+	 * alias translation by [[getAlias()]].
 	 * @param string $path the path corresponding to the alias. Trailing '/' and '\' characters
 	 * will be trimmed. This can be
 	 *
 	 * - a directory or a file path (e.g. `/tmp`, `/tmp/main.txt`)
 	 * - a URL (e.g. `http://www.yiiframework.com`)
 	 * - a path alias (e.g. `@yii/base`). In this case, the path alias will be converted into the
 	 *   actual path first by calling [[getAlias()]].
 	 *
-	 * @throws Exception if $path is an invalid alias
+	 * @throws InvalidParamException if $path is an invalid alias.
 	 * @see getAlias
 	 */
 	public static function setAlias($alias, $path)
 	{
-		if ($path === null) {
+		if (strncmp($alias, '@', 1)) {
-			unset(self::$aliases[$alias]);
+			$alias = '@' . $alias;
-		} elseif (strncmp($path, '@', 1)) {
+		}
-			self::$aliases[$alias] = rtrim($path, '\\/');
+		$pos = strpos($alias, '/');
 		$root = $pos === false ? $alias : substr($alias, 0, $pos);
 		if ($path !== null) {
 			$path = strncmp($path, '@', 1) ? rtrim($path, '\\/') : static::getAlias($path);
 			if (!isset(self::$aliases[$root])) {
 				self::$aliases[$root] = $path;
 			} elseif (is_string(self::$aliases[$root])) {
 				if ($pos === false) {
 					self::$aliases[$root] = $path;
 				} else {
-			self::$aliases[$alias] = static::getAlias($path);
+					self::$aliases[$root] = array(
 						$alias => $path,
 						$root => self::$aliases[$root],
 					);
 				}
 			} else {
 				self::$aliases[$root][$alias] = $path;
 				krsort(self::$aliases[$root]);
 			}
 		} elseif (isset(self::$aliases[$root])) {
 			if (is_array(self::$aliases[$root])) {
 				unset(self::$aliases[$root][$alias]);
 			} elseif ($pos === false) {
 				unset(self::$aliases[$root]);
 			}
 		}
 	}
 	/**
 	 * Class autoload loader.
-	 * This method is invoked automatically when the execution encounters an unknown class.
+	 * This method is invoked automatically when PHP sees an unknown class.
-	 * The method will attempt to include the class file as follows:
+	 * The method will attempt to include the class file according to the following procedure:
 	 *
 	 * 1. Search in [[classMap]];
 	 * 2. If the class is namespaced (e.g. `yii\base\Component`), it will attempt
@ -261,43 +320,58 @@ class YiiBase
 	 * 3. If the class is named in PEAR style (e.g. `PHPUnit_Framework_TestCase`),
 	 *    it will attempt to include the file associated with the corresponding path alias
 	 *    (e.g. `@PHPUnit/Framework/TestCase.php`);
-	 * 4. Search in [[classPath]];
+	 * 4. Search PHP include_path for the actual class file if [[enableIncludePath]] is true;
 	 * 5. Return false so that other autoloaders have chance to include the class file.
 	 *
 	 * @param string $className class name
 	 * @return boolean whether the class has been loaded successfully
-	 * @throws Exception if the class file does not exist
+	 * @throws InvalidConfigException if the class file does not exist
 	 * @throws UnknownClassException if the class does not exist in the class file
 	 */
 	public static function autoload($className)
 	{
 		$className = ltrim($className, '\\');
 		if (isset(self::$classMap[$className])) {
-			$classFile = self::$classMap[$className];
+			$classFile = static::getAlias(self::$classMap[$className]);
 			if (!is_file($classFile)) {
 				throw new InvalidConfigException("Class file does not exist: $classFile");
 			}
 		} else {
 			// follow PSR-0 to determine the class file
 			if (($pos = strrpos($className, '\\')) !== false) {
 				// namespaced class, e.g. yii\base\Component
-				$classFile = str_replace('\\', '/', substr($className, 0, $pos + 1))
+				$path = str_replace('\\', '/', substr($className, 0, $pos + 1))
 					. str_replace('_', '/', substr($className, $pos + 1)) . '.php';
 			} else {
-				$classFile = str_replace('_', '/', $className) . '.php';
+				$path = str_replace('_', '/', $className) . '.php';
 			}
 			// try via path alias first
 			if (strpos($path, '/') !== false) {
 				$fullPath = static::getAlias('@' . $path, false);
 				if ($fullPath !== false && is_file($fullPath)) {
 					$classFile = $fullPath;
 				}
-			if (strpos($classFile, '/') !== false) {
+			}
-				// make it into a path alias
+
-				$classFile = '@' . $classFile;
+			// search include_path
 			if (!isset($classFile) && self::$enableIncludePath && ($fullPath = stream_resolve_include_path($path)) !== false) {
 				$classFile = $fullPath;
 			}
 			if (!isset($classFile)) {
 				// return false to let other autoloaders to try loading the class
 				return false;
 			}
 		}
 		$classFile = static::getAlias($classFile);
 		if ($classFile !== false && is_file($classFile)) {
 		include($classFile);
 		if (class_exists($className, false) || interface_exists($className, false)) {
 			return true;
 		} else {
-				throw new Exception("Unable to find '$className' in file: $classFile");
+			throw new UnknownClassException("Unable to find '$className' in file: $classFile");
 			}
 		} else {
 			return false;
 		}
 	}
@ -305,16 +379,16 @@ class YiiBase
 	 * Creates a new object using the given configuration.
 	 *
 	 * The configuration can be either a string or an array.
-	 * If a string, it is treated as the *object type*; if an array,
+	 * If a string, it is treated as the *object class*; if an array,
-	 * it must contain a `class` element specifying the *object type*, and
+	 * it must contain a `class` element specifying the *object class*, and
 	 * the rest of the name-value pairs in the array will be used to initialize
 	 * the corresponding object properties.
 	 *
-	 * The object type can be either a class name or the [[getAlias|alias]] of
+	 * The object type can be either a class name or the [[getAlias()|alias]] of
 	 * the class. For example,
 	 *
-	 * - `\app\components\GoogleMap`: fully-qualified namespaced class.
+	 * - `app\components\GoogleMap`: fully-qualified namespaced class.
-	 * - `@app/components/GoogleMap`: an alias
+	 * - `@app/components/GoogleMap`: an alias, used for non-namespaced class.
 	 *
 	 * Below are some usage examples:
 	 *
@ -357,7 +431,7 @@ class YiiBase
 		}
 		if (!class_exists($class, false)) {
-			$class = static::import($class, true);
+			$class = static::import($class);
 		}
 		$class = ltrim($class, '\\');
--- a/framework/assets.php
+++ b/framework/assets.php
@ -0,0 +1,5 @@
 <?php
 return array(
 	'basePath' => __DIR__ . '/web/assets',
 );
--- a/framework/base/Application.php
+++ b/framework/base/Application.php
@ -13,36 +13,6 @@ use yii\helpers\FileHelper;
 /**
 * Application is the base class for all application classes.
 *
 * An application serves as the global context that the user request
 * is being processed. It manages a set of application components that
 * provide specific functionalities to the whole application.
 *
 * The core application components provided by Application are the following:
 * <ul>
 * <li>{@link getErrorHandler errorHandler}: handles PHP errors and
 *   uncaught exceptions. This application component is dynamically loaded when needed.</li>
 * <li>{@link getSecurityManager securityManager}: provides security-related
 *   services, such as hashing, encryption. This application component is dynamically
 *   loaded when needed.</li>
 * <li>{@link getStatePersister statePersister}: provides global state
 *   persistence method. This application component is dynamically loaded when needed.</li>
 * <li>{@link getCache cache}: provides caching feature. This application component is
 *   disabled by default.</li>
 * </ul>
 *
 * Application will undergo the following life cycles when processing a user request:
 * <ol>
 * <li>load application configuration;</li>
 * <li>set up class autoloader and error handling;</li>
 * <li>load static application components;</li>
 * <li>{@link beforeRequest}: preprocess the user request; `beforeRequest` event raised.</li>
 * <li>{@link processRequest}: process the user request;</li>
 * <li>{@link afterRequest}: postprocess the user request; `afterRequest` event raised.</li>
 * </ol>
 *
 * Starting from lifecycle 3, if a PHP error or an uncaught exception occurs,
 * the application will switch to its error handling logic and jump to step 6 afterwards.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
@ -87,12 +57,10 @@ class Application extends Module
 	 */
 	public $layout = 'main';
 	private $_runtimePath;
 	private $_ended = false;
 	/**
-	 * @var string Used to reserve memory for fatal error handler. This memory
+	 * @var string Used to reserve memory for fatal error handler.
 	 * reserve can be removed if it's OK to write to PHP log only in this particular case.
 	 */
 	private $_memoryReserve;
@ -112,8 +80,8 @@ class Application extends Module
 		if (isset($config['basePath'])) {
 			$this->setBasePath($config['basePath']);
 			Yii::setAlias('@app', $this->getBasePath());
 			unset($config['basePath']);
 			Yii::$aliases['@app'] = $this->getBasePath();
 		} else {
 			throw new InvalidConfigException('The "basePath" configuration is required.');
 		}
@ -158,30 +126,6 @@ class Application extends Module
 	}
 	/**
 	 * Handles fatal PHP errors
 	 */
 	public function handleFatalError()
 	{
 		if (YII_ENABLE_ERROR_HANDLER) {
 			$error = error_get_last();
 			if (ErrorException::isFatalErorr($error)) {
 				unset($this->_memoryReserve);
 				$exception = new ErrorException($error['message'], $error['type'], $error['type'], $error['file'], $error['line']);
 				$this->logException($exception);
 				if (($handler = $this->getErrorHandler()) !== null) {
 					@$handler->handle($exception);
 				} else {
 					$this->renderException($exception);
 				}
 				exit(1);
 			}
 		}
 	}
 	/**
 	 * Runs the application.
 	 * This is the main entrance of an application.
 	 * @return integer the exit status (0 means normal, non-zero values mean abnormal)
@ -224,6 +168,8 @@ class Application extends Module
 		return 0;
 	}
 	private $_runtimePath;
 	/**
 	 * Returns the directory that stores runtime files.
 	 * @return string the directory that stores runtime files. Defaults to 'protected/runtime'.
@ -243,12 +189,35 @@ class Application extends Module
 	 */
 	public function setRuntimePath($path)
 	{
-		$p = FileHelper::ensureDirectory($path);
+		$path = Yii::getAlias($path);
-		if (is_writable($p)) {
+		if (is_dir($path) && is_writable($path)) {
-			$this->_runtimePath = $p;
+			$this->_runtimePath = $path;
 		} else {
-			throw new InvalidConfigException("Runtime path must be writable by the Web server process: $path");
+			throw new InvalidConfigException("Runtime path must be a directory writable by the Web server process: $path");
 		}
 	}
 	private $_vendorPath;
 	/**
 	 * Returns the directory that stores vendor files.
 	 * @return string the directory that stores vendor files. Defaults to 'protected/vendor'.
 	 */
 	public function getVendorPath()
 	{
 		if ($this->_vendorPath === null) {
 			$this->setVendorPath($this->getBasePath() . DIRECTORY_SEPARATOR . 'vendor');
 		}
 		return $this->_vendorPath;
 	}
 	/**
 	 * Sets the directory that stores vendor files.
 	 * @param string $path the directory that stores vendor files.
 	 */
 	public function setVendorPath($path)
 	{
 		$this->_vendorPath = Yii::getAlias($path);
 	}
 	/**
@ -359,6 +328,45 @@ class Application extends Module
 	}
 	/**
 	 * Handles uncaught PHP exceptions.
 	 *
 	 * This method is implemented as a PHP exception handler. It requires
 	 * that constant YII_ENABLE_ERROR_HANDLER be defined true.
 	 *
 	 * @param \Exception $exception exception that is not caught
 	 */
 	public function handleException($exception)
 	{
 		// disable error capturing to avoid recursive errors while handling exceptions
 		restore_error_handler();
 		restore_exception_handler();
 		try {
 			$this->logException($exception);
 			if (($handler = $this->getErrorHandler()) !== null) {
 				$handler->handle($exception);
 			} else {
 				$this->renderException($exception);
 			}
 			$this->end(1);
 		} catch (\Exception $e) {
 			// exception could be thrown in end() or ErrorHandler::handle()
 			$msg = (string)$e;
 			$msg .= "\nPrevious exception:\n";
 			$msg .= (string)$exception;
 			if (YII_DEBUG) {
 				echo $msg;
 			}
 			$msg .= "\n\$_SERVER = " . var_export($_SERVER, true);
 			error_log($msg);
 			exit(1);
 		}
 	}
 	/**
 	 * Handles PHP execution errors such as warnings, notices.
 	 *
 	 * This method is used as a PHP error handler. It will simply raise an `ErrorException`.
@ -389,21 +397,18 @@ class Application extends Module
 	}
 	/**
-	 * Handles uncaught PHP exceptions.
+	 * Handles fatal PHP errors
 	 *
 	 * This method is implemented as a PHP exception handler. It requires
 	 * that constant YII_ENABLE_ERROR_HANDLER be defined true.
 	 *
 	 * @param \Exception $exception exception that is not caught
 	 */
-	public function handleException($exception)
+	public function handleFatalError()
 	{
-		// disable error capturing to avoid recursive errors while handling exceptions
+		if (YII_ENABLE_ERROR_HANDLER) {
-		restore_error_handler();
+			$error = error_get_last();
 		restore_exception_handler();
-		try {
+			if (ErrorException::isFatalError($error)) {
-			$this->logException($exception);
+				unset($this->_memoryReserve);
 				$exception = new ErrorException($error['message'], $error['type'], $error['type'], $error['file'], $error['line']);
 				// use error_log because it's too late to use Yii log
 				error_log($exception);
 				if (($handler = $this->getErrorHandler()) !== null) {
 					$handler->handle($exception);
@ -411,21 +416,10 @@ class Application extends Module
 					$this->renderException($exception);
 				}
 			$this->end(1);
 		} catch (\Exception $e) {
 			// exception could be thrown in end() or ErrorHandler::handle()
 			$msg = (string)$e;
 			$msg .= "\nPrevious exception:\n";
 			$msg .= (string)$exception;
 			if (YII_DEBUG) {
 				echo $msg;
 			}
 			$msg .= "\n\$_SERVER = " . var_export($_SERVER, true);
 			error_log($msg);
 				exit(1);
 			}
 		}
 	}
 	/**
 	 * Renders an exception without using rich format.
--- a/framework/base/Controller.php
+++ b/framework/base/Controller.php
@ -428,7 +428,7 @@ class Controller extends Component
 			$file = $this->getViewPath() . DIRECTORY_SEPARATOR . $view;
 		}
-		return FileHelper::getExtension($file) === '' ? $file . '.php' : $file;
+		return pathinfo($file, PATHINFO_EXTENSION) === '' ? $file . '.php' : $file;
 	}
 	/**
@ -463,7 +463,7 @@ class Controller extends Component
 			$file = $module->getLayoutPath() . DIRECTORY_SEPARATOR . $view;
 		}
-		if (FileHelper::getExtension($file) === '') {
+		if (pathinfo($file, PATHINFO_EXTENSION) === '') {
 			$file .= '.php';
 		}
 		return $file;
--- a/framework/base/ErrorException.php
+++ b/framework/base/ErrorException.php
@ -79,7 +79,7 @@ class ErrorException extends Exception
 	 * @param array $error error got from error_get_last()
 	 * @return bool if error is one of fatal type
 	 */
-	public static function isFatalErorr($error)
+	public static function isFatalError($error)
 	{
 		return isset($error['type']) && in_array($error['type'], array(E_ERROR, E_PARSE, E_CORE_ERROR, E_CORE_WARNING, E_COMPILE_ERROR, E_COMPILE_WARNING));
 	}
--- a/framework/base/ErrorHandler.php
+++ b/framework/base/ErrorHandler.php
@ -51,6 +51,7 @@ class ErrorHandler extends Component
 	/**
 	 * Handles exception
 	 * @param \Exception $exception
 	 */
 	public function handle($exception)
@ -64,6 +65,10 @@ class ErrorHandler extends Component
 		$this->renderException($exception);
 	}
 	/**
 	 * Renders exception
 	 * @param \Exception $exception
 	 */
 	protected function renderException($exception)
 	{
 		if ($this->errorAction !== null) {
@ -76,6 +81,12 @@ class ErrorHandler extends Component
 			if (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest') {
 				\Yii::$app->renderException($exception);
 			} else {
 				// if there is an error during error rendering it's useful to
 				// display PHP error in debug mode instead of a blank screen
 				if(YII_DEBUG) {
 					ini_set('display_errors', 1);
 				}
 				$view = new View;
 				if (!YII_DEBUG || $exception instanceof UserException) {
 					$viewName = $this->errorView;
@ -196,6 +207,10 @@ class ErrorHandler extends Component
 		echo '<div class="code"><pre>' . $output . '</pre></div>';
 	}
 	/**
 	 * Renders calls stack trace
 	 * @param array $trace
 	 */
 	public function renderTrace($trace)
 	{
 		$count = 0;
@ -233,6 +248,11 @@ class ErrorHandler extends Component
 		echo '</table>';
 	}
 	/**
 	 * Converts special characters to HTML entities
 	 * @param string $text text to encode
 	 * @return string
 	 */
 	public function htmlEncode($text)
 	{
 		return htmlspecialchars($text, ENT_QUOTES, \Yii::$app->charset);
--- a/framework/base/Module.php
+++ b/framework/base/Module.php
@ -207,11 +207,17 @@ abstract class Module extends Component
 	 * Sets the root directory of the module.
 	 * This method can only be invoked at the beginning of the constructor.
 	 * @param string $path the root directory of the module. This can be either a directory name or a path alias.
-	 * @throws Exception if the directory does not exist.
+	 * @throws InvalidParamException if the directory does not exist.
 	 */
 	public function setBasePath($path)
 	{
-		$this->_basePath = FileHelper::ensureDirectory($path);
+		$path = Yii::getAlias($path);
 		$p = realpath($path);
 		if ($p !== false && is_dir($p)) {
 			$this->_basePath = $p;
 		} else {
 			throw new InvalidParamException("The directory does not exist: $path");
 		}
 	}
 	/**
@ -236,7 +242,7 @@ abstract class Module extends Component
 	 */
 	public function setControllerPath($path)
 	{
-		$this->_controllerPath = FileHelper::ensureDirectory($path);
+		$this->_controllerPath = Yii::getAlias($path);
 	}
 	/**
@ -259,7 +265,7 @@ abstract class Module extends Component
 	 */
 	public function setViewPath($path)
 	{
-		$this->_viewPath = FileHelper::ensureDirectory($path);
+		$this->_viewPath = Yii::getAlias($path);
 	}
 	/**
@ -282,20 +288,7 @@ abstract class Module extends Component
 	 */
 	public function setLayoutPath($path)
 	{
-		$this->_layoutPath = FileHelper::ensureDirectory($path);
+		$this->_layoutPath = Yii::getAlias($path);
 	}
 	/**
 	 * Imports the specified path aliases.
 	 * This method is provided so that you can import a set of path aliases when configuring a module.
 	 * The path aliases will be imported by calling [[Yii::import()]].
 	 * @param array $aliases list of path aliases to be imported
 	 */
 	public function setImport($aliases)
 	{
 		foreach ($aliases as $alias) {
 			Yii::import($alias);
 		}
 	}
 	/**
@ -606,16 +599,17 @@ abstract class Module extends Component
 		} elseif (preg_match('/^[a-z0-9\\-_]+$/', $id)) {
 			$className = StringHelper::id2camel($id) . 'Controller';
 			$classFile = $this->controllerPath . DIRECTORY_SEPARATOR . $className . '.php';
 			if (!is_file($classFile)) {
 				return false;
 			}
 			$className = ltrim($this->controllerNamespace . '\\' . $className, '\\');
 			Yii::$classMap[$className] = $classFile;
 			if (class_exists($className)) {
 			if (is_subclass_of($className, 'yii\base\Controller')) {
 				$controller = new $className($id, $this);
-				} elseif (YII_DEBUG && !is_subclass_of($className, 'yii\base\Controller')) {
+			} elseif (YII_DEBUG) {
 				throw new InvalidConfigException("Controller class must extend from \\yii\\base\\Controller.");
 			}
 		}
 		}
 		return isset($controller) ? array($controller, $route) : false;
 	}
--- a/framework/base/Response.php
+++ b/framework/base/Response.php
@ -13,28 +13,38 @@ namespace yii\base;
 */
 class Response extends Component
 {
 	/**
 	 * Starts output buffering
 	 */
 	public function beginOutput()
 	{
 		ob_start();
 		ob_implicit_flush(false);
 	}
 	/**
 	 * Returns contents of the output buffer and discards it
 	 * @return string output buffer contents
 	 */
 	public function endOutput()
 	{
 		return ob_get_clean();
 	}
 	/**
 	 * Returns contents of the output buffer
 	 * @return string output buffer contents
 	 */
 	public function getOutput()
 	{
 		return ob_get_contents();
 	}
-	public function cleanOutput()
+	/**
-	{
+	 * Discards the output buffer
-		ob_clean();
+	 * @param boolean $all if true recursively discards all output buffers used
-	}
+	 */
-
+	public function cleanOutput($all = true)
 	public function removeOutput($all = true)
 	{
 		if ($all) {
 			for ($level = ob_get_level(); $level > 0; --$level) {
--- a/framework/base/Theme.php
+++ b/framework/base/Theme.php
@ -61,10 +61,10 @@ class Theme extends Component
 	 	parent::init();
 		if (empty($this->pathMap)) {
 			if ($this->basePath !== null) {
-				$this->basePath = FileHelper::ensureDirectory($this->basePath);
+				$this->basePath = Yii::getAlias($this->basePath);
 				$this->pathMap = array(Yii::$app->getBasePath() => $this->basePath);
 			} else {
-				throw new InvalidConfigException("Theme::basePath must be set.");
+				throw new InvalidConfigException('The "basePath" property must be set.');
 			}
 		}
 		$paths = array();
@ -75,7 +75,7 @@ class Theme extends Component
 		}
 		$this->pathMap = $paths;
 		if ($this->baseUrl === null) {
-			throw new InvalidConfigException("Theme::baseUrl must be set.");
+			throw new InvalidConfigException('The "baseUrl" property must be set.');
 		} else {
 			$this->baseUrl = rtrim(Yii::getAlias($this->baseUrl), '/');
 		}
--- a/framework/base/UnknownClassException.php
+++ b/framework/base/UnknownClassException.php
@ -0,0 +1,26 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\base;
 /**
 * UnknownClassException represents an exception caused by accessing an unknown class.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class UnknownClassException extends Exception
 {
 	/**
 	 * @return string the user-friendly name of this exception
 	 */
 	public function getName()
 	{
 		return \Yii::t('yii|Unknown Class');
 	}
 }
--- a/framework/base/UnknownMethodException.php
+++ b/framework/base/UnknownMethodException.php
@ -8,7 +8,7 @@
 namespace yii\base;
 /**
- * UnknownMethodException represents an exception caused by accessing unknown object methods.
+ * UnknownMethodException represents an exception caused by accessing an unknown object method.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
--- a/framework/base/View.php
+++ b/framework/base/View.php
@ -10,6 +10,7 @@ namespace yii\base;
 use Yii;
 use yii\base\Application;
 use yii\helpers\FileHelper;
 use yii\helpers\Html;
 /**
 * View represents a view object in the MVC pattern.
@ -22,22 +23,48 @@ use yii\helpers\FileHelper;
 class View extends Component
 {
 	/**
-	 * @event Event an event that is triggered by [[renderFile()]] right before it renders a view file.
+	 * @event ViewEvent an event that is triggered by [[renderFile()]] right before it renders a view file.
 	 */
 	const EVENT_BEFORE_RENDER = 'beforeRender';
 	/**
-	 * @event Event an event that is triggered by [[renderFile()]] right after it renders a view file.
+	 * @event ViewEvent an event that is triggered by [[renderFile()]] right after it renders a view file.
 	 */
 	const EVENT_AFTER_RENDER = 'afterRender';
 	/**
-	 * @var object the object that owns this view. This can be a controller, a widget, or any other object.
+	 * The location of registered JavaScript code block or files.
 	 * This means the location is in the head section.
 	 */
-	public $context;
+	const POS_HEAD = 1;
 	/**
 	 * The location of registered JavaScript code block or files.
 	 * This means the location is at the beginning of the body section.
 	 */
 	const POS_BEGIN = 2;
 	/**
 	 * The location of registered JavaScript code block or files.
 	 * This means the location is at the end of the body section.
 	 */
 	const POS_END = 3;
 	/**
 	 * This is internally used as the placeholder for receiving the content registered for the head section.
 	 */
 	const PL_HEAD = '<![CDATA[YII-BLOCK-HEAD]]>';
 	/**
 	 * This is internally used as the placeholder for receiving the content registered for the beginning of the body section.
 	 */
 	const PL_BODY_BEGIN = '<![CDATA[YII-BLOCK-BODY-BEGIN]]>';
 	/**
-	 * @var ViewContent
+	 * This is internally used as the placeholder for receiving the content registered for the end of the body section.
 	 */
-	public $content;
+	const PL_BODY_END = '<![CDATA[YII-BLOCK-BODY-END]]>';
 	/**
 	 * @var object the context under which the [[renderFile()]] method is being invoked.
 	 * This can be a controller, a widget, or any other object.
 	 */
 	public $context;
 	/**
 	 * @var mixed custom parameters that are shared among view templates.
 	 */
@ -48,31 +75,75 @@ class View extends Component
 	 */
 	public $renderer;
 	/**
-	 * @var Theme|array the theme object or the configuration array for creating the theme.
+	 * @var Theme|array the theme object or the configuration array for creating the theme object.
 	 * If not set, it means theming is not enabled.
 	 */
 	public $theme;
 	/**
-	 * @var array a list of named output clips. You can call [[beginClip()]] and [[endClip()]]
+	 * @var array a list of named output blocks. The keys are the block names and the values
-	 * to capture small fragments of a view. They can be later accessed at somewhere else
+	 * are the corresponding block content. You can call [[beginBlock()]] and [[endBlock()]]
 	 * to capture small fragments of a view. They can be later accessed somewhere else
 	 * through this property.
 	 */
-	public $clips;
+	public $blocks;
 	/**
 	 * @var Widget[] the widgets that are currently being rendered (not ended). This property
-	 * is maintained by [[beginWidget()]] and [[endWidget()]] methods. Do not modify it.
+	 * is maintained by [[beginWidget()]] and [[endWidget()]] methods. Do not modify it directly.
 	 * @internal
 	 */
 	public $widgetStack = array();
 	/**
 	 * @var array a list of currently active fragment cache widgets. This property
-	 * is used internally to implement the content caching feature. Do not modify it.
+	 * is used internally to implement the content caching feature. Do not modify it directly.
 	 * @internal
 	 */
 	public $cacheStack = array();
 	/**
 	 * @var array a list of placeholders for embedding dynamic contents. This property
-	 * is used internally to implement the content caching feature. Do not modify it.
+	 * is used internally to implement the content caching feature. Do not modify it directly.
 	 * @internal
 	 */
 	public $dynamicPlaceholders = array();
 	/**
 	 * @var array the registered asset bundles. The keys are the bundle names, and the values
 	 * are the corresponding [[AssetBundle]] objects.
 	 * @see registerAssetBundle
 	 */
 	public $assetBundles;
 	/**
 	 * @var string the page title
 	 */
 	public $title;
 	/**
 	 * @var array the registered meta tags.
 	 * @see registerMetaTag
 	 */
 	public $metaTags;
 	/**
 	 * @var array the registered link tags.
 	 * @see registerLinkTag
 	 */
 	public $linkTags;
 	/**
 	 * @var array the registered CSS code blocks.
 	 * @see registerCss
 	 */
 	public $css;
 	/**
 	 * @var array the registered CSS files.
 	 * @see registerCssFile
 	 */
 	public $cssFiles;
 	/**
 	 * @var array the registered JS code blocks
 	 * @see registerJs
 	 */
 	public $js;
 	/**
 	 * @var array the registered JS files.
 	 * @see registerJsFile
 	 */
 	public $jsFiles;
 	/**
@ -87,11 +158,6 @@ class View extends Component
 		if (is_array($this->theme)) {
 			$this->theme = Yii::createObject($this->theme);
 		}
 		if (is_array($this->content)) {
 			$this->content = Yii::createObject($this->content);
 		} else {
 			$this->content = new ViewContent;
 		}
 	}
 	/**
@ -165,7 +231,6 @@ class View extends Component
 			} else {
 				$output = $this->renderPhpFile($viewFile, $params);
 			}
 			$output = $this->content->populate($output);
 			$this->afterRender($viewFile, $output);
 		}
@ -241,7 +306,7 @@ class View extends Component
 	{
 		if (!empty($this->cacheStack)) {
 			$n = count($this->dynamicPlaceholders);
-			$placeholder = "<![CDATA[YDP-$n]]>";
+			$placeholder = "<![CDATA[YII-DYNAMIC-$n]]>";
 			$this->addDynamicPlaceholder($placeholder, $statements);
 			return $placeholder;
 		} else {
@ -350,26 +415,25 @@ class View extends Component
 	}
 	/**
-	 * Begins recording a clip.
+	 * Begins recording a block.
-	 * This method is a shortcut to beginning [[yii\widgets\Clip]]
+	 * This method is a shortcut to beginning [[yii\widgets\Block]]
-	 * @param string $id the clip ID.
+	 * @param string $id the block ID.
-	 * @param boolean $renderInPlace whether to render the clip content in place.
+	 * @param boolean $renderInPlace whether to render the block content in place.
-	 * Defaults to false, meaning the captured clip will not be displayed.
+	 * Defaults to false, meaning the captured block will not be displayed.
-	 * @return \yii\widgets\Clip the Clip widget instance
+	 * @return \yii\widgets\Block the Block widget instance
-	 * @see \yii\widgets\Clip
+	 */
-	 */
+	public function beginBlock($id, $renderInPlace = false)
 	public function beginClip($id, $renderInPlace = false)
 	{
-		return $this->beginWidget('yii\widgets\Clip', array(
+		return $this->beginWidget('yii\widgets\Block', array(
 			'id' => $id,
 			'renderInPlace' => $renderInPlace,
 		));
 	}
 	/**
-	 * Ends recording a clip.
+	 * Ends recording a block.
 	 */
-	public function endClip()
+	public function endBlock()
 	{
 		$this->endWidget();
 	}
@ -446,4 +510,273 @@ class View extends Component
 	{
 		$this->endWidget();
 	}
 	private $_assetManager;
 	/**
 	 * Registers the asset manager being used by this view object.
 	 * @return \yii\web\AssetManager the asset manager. Defaults to the "assetManager" application component.
 	 */
 	public function getAssetManager()
 	{
 		return $this->_assetManager ?: Yii::$app->getAssetManager();
 	}
 	/**
 	 * Sets the asset manager.
 	 * @param \yii\web\AssetManager $value the asset manager
 	 */
 	public function setAssetManager($value)
 	{
 		$this->_assetManager = $value;
 	}
 	/**
 	 * Marks the beginning of an HTML page.
 	 */
 	public function beginPage()
 	{
 		ob_start();
 		ob_implicit_flush(false);
 	}
 	/**
 	 * Marks the ending of an HTML page.
 	 */
 	public function endPage()
 	{
 		$content = ob_get_clean();
 		echo strtr($content, array(
 			self::PL_HEAD => $this->renderHeadHtml(),
 			self::PL_BODY_BEGIN => $this->renderBodyBeginHtml(),
 			self::PL_BODY_END => $this->renderBodyEndHtml(),
 		));
 		unset(
 			$this->assetBundles,
 			$this->metaTags,
 			$this->linkTags,
 			$this->css,
 			$this->cssFiles,
 			$this->js,
 			$this->jsFiles
 		);
 	}
 	/**
 	 * Marks the beginning of an HTML body section.
 	 */
 	public function beginBody()
 	{
 		echo self::PL_BODY_BEGIN;
 	}
 	/**
 	 * Marks the ending of an HTML body section.
 	 */
 	public function endBody()
 	{
 		echo self::PL_BODY_END;
 	}
 	/**
 	 * Marks the position of an HTML head section.
 	 */
 	public function head()
 	{
 		echo self::PL_HEAD;
 	}
 	/**
 	 * Registers the named asset bundle.
 	 * All dependent asset bundles will be registered.
 	 * @param string $name the name of the asset bundle.
 	 * @throws InvalidConfigException if the asset bundle does not exist or a circular dependency is detected
 	 */
 	public function registerAssetBundle($name)
 	{
 		if (!isset($this->assetBundles[$name])) {
 			$am = $this->getAssetManager();
 			$bundle = $am->getBundle($name);
 			if ($bundle !== null) {
 				$this->assetBundles[$name] = false;
 				$bundle->registerAssets($this);
 				$this->assetBundles[$name] = true;
 			} else {
 				throw new InvalidConfigException("Unknown asset bundle: $name");
 			}
 		} elseif ($this->assetBundles[$name] === false) {
 			throw new InvalidConfigException("A circular dependency is detected for bundle '$name'.");
 		}
 	}
 	/**
 	 * Registers a meta tag.
 	 * @param array $options the HTML attributes for the meta tag.
 	 * @param string $key the key that identifies the meta tag. If two meta tags are registered
 	 * with the same key, the latter will overwrite the former. If this is null, the new meta tag
 	 * will be appended to the existing ones.
 	 */
 	public function registerMetaTag($options, $key = null)
 	{
 		if ($key === null) {
 			$this->metaTags[] = Html::tag('meta', '', $options);
 		} else {
 			$this->metaTags[$key] = Html::tag('meta', '', $options);
 		}
 	}
 	/**
 	 * Registers a link tag.
 	 * @param array $options the HTML attributes for the link tag.
 	 * @param string $key the key that identifies the link tag. If two link tags are registered
 	 * with the same key, the latter will overwrite the former. If this is null, the new link tag
 	 * will be appended to the existing ones.
 	 */
 	public function registerLinkTag($options, $key = null)
 	{
 		if ($key === null) {
 			$this->linkTags[] = Html::tag('link', '', $options);
 		} else {
 			$this->linkTags[$key] = Html::tag('link', '', $options);
 		}
 	}
 	/**
 	 * Registers a CSS code block.
 	 * @param string $css the CSS code block to be registered
 	 * @param array $options the HTML attributes for the style tag.
 	 * @param string $key the key that identifies the CSS code block. If null, it will use
 	 * $css as the key. If two CSS code blocks are registered with the same key, the latter
 	 * will overwrite the former.
 	 */
 	public function registerCss($css, $options = array(), $key = null)
 	{
 		$key = $key ?: $css;
 		$this->css[$key] = Html::style($css, $options);
 	}
 	/**
 	 * Registers a CSS file.
 	 * @param string $url the CSS file to be registered.
 	 * @param array $options the HTML attributes for the link tag.
 	 * @param string $key the key that identifies the CSS script file. If null, it will use
 	 * $url as the key. If two CSS files are registered with the same key, the latter
 	 * will overwrite the former.
 	 */
 	public function registerCssFile($url, $options = array(), $key = null)
 	{
 		$key = $key ?: $url;
 		$this->cssFiles[$key] = Html::cssFile($url, $options);
 	}
 	/**
 	 * Registers a JS code block.
 	 * @param string $js the JS code block to be registered
 	 * @param array $options the HTML attributes for the script tag. A special option
 	 * named "position" is supported which specifies where the JS script tag should be inserted
 	 * in a page. The possible values of "position" are:
 	 *
 	 * - [[POS_HEAD]]: in the head section
 	 * - [[POS_BEGIN]]: at the beginning of the body section
 	 * - [[POS_END]]: at the end of the body section
 	 *
 	 * @param string $key the key that identifies the JS code block. If null, it will use
 	 * $js as the key. If two JS code blocks are registered with the same key, the latter
 	 * will overwrite the former.
 	 */
 	public function registerJs($js, $options = array(), $key = null)
 	{
 		$position = isset($options['position']) ? $options['position'] : self::POS_END;
 		unset($options['position']);
 		$key = $key ?: $js;
 		$this->js[$position][$key] = Html::script($js, $options);
 	}
 	/**
 	 * Registers a JS file.
 	 * @param string $url the JS file to be registered.
 	 * @param array $options the HTML attributes for the script tag. A special option
 	 * named "position" is supported which specifies where the JS script tag should be inserted
 	 * in a page. The possible values of "position" are:
 	 *
 	 * - [[POS_HEAD]]: in the head section
 	 * - [[POS_BEGIN]]: at the beginning of the body section
 	 * - [[POS_END]]: at the end of the body section
 	 *
 	 * @param string $key the key that identifies the JS script file. If null, it will use
 	 * $url as the key. If two JS files are registered with the same key, the latter
 	 * will overwrite the former.
 	 */
 	public function registerJsFile($url, $options = array(), $key = null)
 	{
 		$position = isset($options['position']) ? $options['position'] : self::POS_END;
 		unset($options['position']);
 		$key = $key ?: $url;
 		$this->jsFiles[$position][$key] = Html::jsFile($url, $options);
 	}
 	/**
 	 * Renders the content to be inserted in the head section.
 	 * The content is rendered using the registered meta tags, link tags, CSS/JS code blocks and files.
 	 * @return string the rendered content
 	 */
 	protected function renderHeadHtml()
 	{
 		$lines = array();
 		if (!empty($this->metaTags)) {
 			$lines[] = implode("\n", $this->cssFiles);
 		}
 		if (!empty($this->linkTags)) {
 			$lines[] = implode("\n", $this->cssFiles);
 		}
 		if (!empty($this->cssFiles)) {
 			$lines[] = implode("\n", $this->cssFiles);
 		}
 		if (!empty($this->css)) {
 			$lines[] = implode("\n", $this->css);
 		}
 		if (!empty($this->jsFiles[self::POS_HEAD])) {
 			$lines[] = implode("\n", $this->jsFiles[self::POS_HEAD]);
 		}
 		if (!empty($this->js[self::POS_HEAD])) {
 			$lines[] = implode("\n", $this->js[self::POS_HEAD]);
 		}
 		return implode("\n", $lines);
 	}
 	/**
 	 * Renders the content to be inserted at the beginning of the body section.
 	 * The content is rendered using the registered JS code blocks and files.
 	 * @return string the rendered content
 	 */
 	protected function renderBodyBeginHtml()
 	{
 		$lines = array();
 		if (!empty($this->jsFiles[self::POS_BEGIN])) {
 			$lines[] = implode("\n", $this->jsFiles[self::POS_BEGIN]);
 		}
 		if (!empty($this->js[self::POS_BEGIN])) {
 			$lines[] = implode("\n", $this->js[self::POS_BEGIN]);
 		}
 		return implode("\n", $lines);
 	}
 	/**
 	 * Renders the content to be inserted at the end of the body section.
 	 * The content is rendered using the registered JS code blocks and files.
 	 * @return string the rendered content
 	 */
 	protected function renderBodyEndHtml()
 	{
 		$lines = array();
 		if (!empty($this->jsFiles[self::POS_END])) {
 			$lines[] = implode("\n", $this->jsFiles[self::POS_END]);
 		}
 		if (!empty($this->js[self::POS_END])) {
 			$lines[] = implode("\n", $this->js[self::POS_END]);
 		}
 		return implode("\n", $lines);
 	}
 }
--- a/framework/base/ViewContent.php
+++ b/framework/base/ViewContent.php
@ -1,136 +0,0 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\base;
 /**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class ViewContent extends Component
 {
 	const POS_HEAD = 1;
 	const POS_BEGIN = 2;
 	const POS_END = 3;
 	/**
 	 * @var array
 	 *
 	 * Each asset bundle should be declared with the following structure:
 	 *
 	 * ~~~
 	 * array(
 	 *     'basePath' => '...',
 	 *     'baseUrl' => '...',  // if missing, the bundle will be published to the "www/assets" folder
 	 *     'js' => array(
 	 *         'js/main.js',
 	 *         'js/menu.js',
 	 *         'js/base.js' => self::POS_HEAD,
 	 *     'css' => array(
 	 *         'css/main.css',
 	 *         'css/menu.css',
 	 *     ),
 	 *     'depends' => array(
 	 *         'jquery',
 	 *         'yii',
 	 *         'yii/treeview',
 	 *     ),
 	 * )
 	 * ~~~
 	 */
 	public $bundles;
 	public $title;
 	public $metaTags;
 	public $linkTags;
 	public $css;
 	public $js;
 	public $cssFiles;
 	public $jsFiles;
 	public function populate($content)
 	{
 		return $content;
 	}
 	public function reset()
 	{
 		$this->title = null;
 		$this->metaTags = null;
 		$this->linkTags = null;
 		$this->css = null;
 		$this->js = null;
 		$this->cssFiles = null;
 		$this->jsFiles = null;
 	}
 	public function registerBundle($name)
 	{
 	}
 	public function getMetaTag($key)
 	{
 		return isset($this->metaTags[$key]) ? $this->metaTags[$key] : null;
 	}
 	public function setMetaTag($key, $tag)
 	{
 		$this->metaTags[$key] = $tag;
 	}
 	public function getLinkTag($key)
 	{
 		return isset($this->linkTags[$key]) ? $this->linkTags[$key] : null;
 	}
 	public function setLinkTag($key, $tag)
 	{
 		$this->linkTags[$key] = $tag;
 	}
 	public function getCss($key)
 	{
 		return isset($this->css[$key]) ? $this->css[$key]: null;
 	}
 	public function setCss($key, $css)
 	{
 		$this->css[$key] = $css;
 	}
 	public function getCssFile($key)
 	{
 		return isset($this->cssFiles[$key]) ? $this->cssFiles[$key]: null;
 	}
 	public function setCssFile($key, $file)
 	{
 		$this->cssFiles[$key] = $file;
 	}
 	public function getJs($key, $position = self::POS_END)
 	{
 		return isset($this->js[$position][$key]) ? $this->js[$position][$key] : null;
 	}
 	public function setJs($key, $js, $position = self::POS_END)
 	{
 		$this->js[$position][$key] = $js;
 	}
 	public function getJsFile($key, $position = self::POS_END)
 	{
 		return isset($this->jsFiles[$position][$key]) ? $this->jsFiles[$position][$key] : null;
 	}
 	public function setJsFile($key, $file, $position = self::POS_END)
 	{
 		$this->jsFiles[$position][$key] = $file;
 	}
 }
--- a/framework/base/Widget.php
+++ b/framework/base/Widget.php
@ -131,6 +131,6 @@ class Widget extends Component
 			$file = $this->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
 		}
-		return FileHelper::getExtension($file) === '' ? $file . '.php' : $file;
+		return pathinfo($file, PATHINFO_EXTENSION) === '' ? $file . '.php' : $file;
 	}
 }
--- a/framework/caching/ApcCache.php
+++ b/framework/caching/ApcCache.php
@ -11,6 +11,7 @@ namespace yii\caching;
 * ApcCache provides APC caching in terms of an application component.
 *
 * To use this application component, the [APC PHP extension](http://www.php.net/apc) must be loaded.
 * In order to enable APC for CLI you should add "apc.enable_cli = 1" to your php.ini.
 *
 * See [[Cache]] for common cache operations that ApcCache supports.
 *
--- a/framework/caching/DbCache.php
+++ b/framework/caching/DbCache.php
@ -124,7 +124,7 @@ class DbCache extends Cache
 		$query = new Query;
 		$query->select(array('id', 'data'))
 			->from($this->cacheTable)
-			->where(array('id' => $keys))
+			->where(array('in', 'id', (array)$keys))
 			->andWhere('([[expire]] = 0 OR [[expire]] > ' . time() . ')');
 		if ($this->db->enableQueryCache) {
--- a/framework/caching/DbDependency.php
+++ b/framework/caching/DbDependency.php
@ -52,6 +52,7 @@ class DbDependency extends Dependency
 	/**
 	 * Generates the data needed to determine if dependency has been changed.
 	 * This method returns the value of the global state.
 	 * @throws InvalidConfigException
 	 * @return mixed the data needed to determine if dependency has been changed.
 	 */
 	protected function generateDependencyData()
--- a/framework/caching/FileCache.php
+++ b/framework/caching/FileCache.php
@ -7,7 +7,7 @@
 namespace yii\caching;
-use yii\base\InvalidConfigException;
+use Yii;
 /**
 * FileCache implements a cache component using files.
@ -51,7 +51,7 @@ class FileCache extends Cache
 	public function init()
 	{
 		parent::init();
-		$this->cachePath = \Yii::getAlias($this->cachePath);
+		$this->cachePath = Yii::getAlias($this->cachePath);
 		if (!is_dir($this->cachePath)) {
 			mkdir($this->cachePath, 0777, true);
 		}
--- a/framework/caching/MemCache.php
+++ b/framework/caching/MemCache.php
@ -106,7 +106,7 @@ class MemCache extends Cache
 	/**
 	 * Returns the underlying memcache (or memcached) object.
 	 * @return \Memcache|\Memcached the memcache (or memcached) object used by this cache component.
-	 * @throws Exception if memcache or memcached extension is not loaded
+	 * @throws InvalidConfigException if memcache or memcached extension is not loaded
 	 */
 	public function getMemcache()
 	{
--- a/framework/caching/ZendDataCache.php
+++ b/framework/caching/ZendDataCache.php
@ -10,7 +10,7 @@ namespace yii\caching;
 /**
 * ZendDataCache provides Zend data caching in terms of an application component.
 *
- * To use this application component, the [Zend Data Cache PHP extensionn](http://www.zend.com/en/products/server/)
+ * To use this application component, the [Zend Data Cache PHP extension](http://www.zend.com/en/products/server/)
 * must be loaded.
 *
 * See [[Cache]] for common cache operations that ZendDataCache supports.
--- a/framework/console/Application.php
+++ b/framework/console/Application.php
@ -129,6 +129,7 @@ class Application extends \yii\base\Application
 			'migrate' => 'yii\console\controllers\MigrateController',
 			'app' => 'yii\console\controllers\AppController',
 			'cache' => 'yii\console\controllers\CacheController',
 			'asset' => 'yii\console\controllers\AssetController',
 		);
 	}
--- a/framework/console/controllers/AppController.php
+++ b/framework/console/controllers/AppController.php
@ -86,7 +86,7 @@ class AppController extends Controller
 			$sourceDir = $this->getSourceDir();
 			$config = $this->getConfig();
-			$list = FileHelper::buildFileList($sourceDir, $path);
+			$list = $this->buildFileList($sourceDir, $path);
 			if(is_array($config)) {
 				foreach($config as $file => $settings) {
@ -96,7 +96,7 @@ class AppController extends Controller
 				}
 			}
-			FileHelper::copyFiles($list);
+			$this->copyFiles($list);
 			if(is_array($config)) {
 				foreach($config as $file => $settings) {
@ -159,7 +159,7 @@ class AppController extends Controller
 	 * @param string $pathTo path to file we want to get relative path for
 	 * @param string $varName variable name w/o $ to replace value with relative path for
 	 *
-	 * @return string target file contetns
+	 * @return string target file contents
 	 */
 	public function replaceRelativePath($source, $pathTo, $varName)
 	{
@ -204,4 +204,121 @@ class AppController extends Controller
 		return '__DIR__.\''.$up.'/'.basename($path1).'\'';
 	}
 	/**
 	 * Copies a list of files from one place to another.
 	 * @param array $fileList the list of files to be copied (name=>spec).
 	 * The array keys are names displayed during the copy process, and array values are specifications
 	 * for files to be copied. Each array value must be an array of the following structure:
 	 * <ul>
 	 * <li>source: required, the full path of the file/directory to be copied from</li>
 	 * <li>target: required, the full path of the file/directory to be copied to</li>
 	 * <li>callback: optional, the callback to be invoked when copying a file. The callback function
 	 *   should be declared as follows:
 	 *   <pre>
 	 *   function foo($source,$params)
 	 *   </pre>
 	 *   where $source parameter is the source file path, and the content returned
 	 *   by the function will be saved into the target file.</li>
 	 * <li>params: optional, the parameters to be passed to the callback</li>
 	 * </ul>
 	 * @see buildFileList
 	 */
 	protected function copyFiles($fileList)
 	{
 		$overwriteAll = false;
 		foreach($fileList as $name=>$file) {
 			$source = strtr($file['source'], '/\\', DIRECTORY_SEPARATOR);
 			$target = strtr($file['target'], '/\\', DIRECTORY_SEPARATOR);
 			$callback = isset($file['callback']) ? $file['callback'] : null;
 			$params = isset($file['params']) ? $file['params'] : null;
 			if(is_dir($source)) {
 				if (!is_dir($target)) {
 					mkdir($target, 0777, true);
 				}
 				continue;
 			}
 			if($callback !== null) {
 				$content = call_user_func($callback, $source, $params);
 			}
 			else {
 				$content = file_get_contents($source);
 			}
 			if(is_file($target)) {
 				if($content === file_get_contents($target)) {
 					echo "  unchanged $name\n";
 					continue;
 				}
 				if($overwriteAll) {
 					echo "  overwrite $name\n";
 				}
 				else {
 					echo "      exist $name\n";
 					echo "            ...overwrite? [Yes|No|All|Quit] ";
 					$answer = trim(fgets(STDIN));
 					if(!strncasecmp($answer, 'q', 1)) {
 						return;
 					}
 					elseif(!strncasecmp($answer, 'y', 1)) {
 						echo "  overwrite $name\n";
 					}
 					elseif(!strncasecmp($answer, 'a', 1)) {
 						echo "  overwrite $name\n";
 						$overwriteAll = true;
 					}
 					else {
 						echo "       skip $name\n";
 						continue;
 					}
 				}
 			}
 			else {
 				if (!is_dir(dirname($target))) {
 					mkdir(dirname($target), 0777, true);
 				}
 				echo "   generate $name\n";
 			}
 			file_put_contents($target, $content);
 		}
 	}
 	/**
 	 * Builds the file list of a directory.
 	 * This method traverses through the specified directory and builds
 	 * a list of files and subdirectories that the directory contains.
 	 * The result of this function can be passed to {@link copyFiles}.
 	 * @param string $sourceDir the source directory
 	 * @param string $targetDir the target directory
 	 * @param string $baseDir base directory
 	 * @param array $ignoreFiles list of the names of files that should
 	 * be ignored in list building process.
 	 * @param array $renameMap hash array of file names that should be
 	 * renamed. Example value: array('1.old.txt'=>'2.new.txt').
 	 * @return array the file list (see {@link copyFiles})
 	 */
 	protected function buildFileList($sourceDir, $targetDir, $baseDir='', $ignoreFiles=array(), $renameMap=array())
 	{
 		$list = array();
 		$handle = opendir($sourceDir);
 		while(($file = readdir($handle)) !== false) {
 			if(in_array($file, array('.', '..', '.svn', '.gitignore', '.hgignore')) || in_array($file, $ignoreFiles)) {
 				continue;
 			}
 			$sourcePath = $sourceDir.DIRECTORY_SEPARATOR.$file;
 			$targetPath = $targetDir.DIRECTORY_SEPARATOR.strtr($file, $renameMap);
 			$name = $baseDir === '' ? $file : $baseDir.'/'.$file;
 			$list[$name] = array(
 				'source' => $sourcePath,
 				'target' => $targetPath,
 			);
 			if(is_dir($sourcePath)) {
 				$list = array_merge($list, self::buildFileList($sourcePath, $targetPath, $name, $ignoreFiles, $renameMap));
 			}
 		}
 		closedir($handle);
 		return $list;
 	}
 }
--- a/framework/console/controllers/AssetController.php
+++ b/framework/console/controllers/AssetController.php
@ -0,0 +1,353 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\console\controllers;
 use Yii;
 use yii\console\Exception;
 use yii\console\Controller;
 /**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class AssetController extends Controller
 {
 	public $defaultAction = 'compress';
 	public $bundles = array();
 	public $extensions = array();
 	/**
 	 * @var array
 	 * ~~~
 	 * 'all' => array(
 	 *     'css' => 'all.css',
 	 *     'js' => 'js.css',
 	 *     'depends' => array( ... ),
 	 * )
 	 * ~~~
 	 */
 	public $targets = array();
 	public $assetManager = array();
 	public $jsCompressor = 'java -jar compiler.jar --js {from} --js_output_file {to}';
 	public $cssCompressor = 'java -jar yuicompressor.jar {from} -o {to}';
 	public function actionCompress($configFile, $bundleFile)
 	{
 		$this->loadConfiguration($configFile);
 		$bundles = $this->loadBundles($this->bundles, $this->extensions);
 		$targets = $this->loadTargets($this->targets, $bundles);
 		$this->publishBundles($bundles, $this->publishOptions);
 		$timestamp = time();
 		foreach ($targets as $target) {
 			if (!empty($target->js)) {
 				$this->buildTarget($target, 'js', $bundles, $timestamp);
 			}
 			if (!empty($target->css)) {
 				$this->buildTarget($target, 'css', $bundles, $timestamp);
 			}
 		}
 		$targets = $this->adjustDependency($targets, $bundles);
 		$this->saveTargets($targets, $bundleFile);
 	}
 	protected function loadConfiguration($configFile)
 	{
 		foreach (require($configFile) as $name => $value) {
 			if (property_exists($this, $name)) {
 				$this->$name = $value;
 			} else {
 				throw new Exception("Unknown configuration option: $name");
 			}
 		}
 		if (!isset($this->assetManager['basePath'])) {
 			throw new Exception("Please specify 'basePath' for the 'assetManager' option.");
 		}
 		if (!isset($this->assetManager['baseUrl'])) {
 			throw new Exception("Please specify 'baseUrl' for the 'assetManager' option.");
 		}
 	}
 	protected function loadBundles($bundles, $extensions)
 	{
 		$result = array();
 		foreach ($bundles as $name => $bundle) {
 			$bundle['class'] = 'yii\\web\\AssetBundle';
 			$result[$name] = Yii::createObject($bundle);
 		}
 		foreach ($extensions as $path) {
 			$manifest = $path . '/assets.php';
 			if (!is_file($manifest)) {
 				continue;
 			}
 			foreach (require($manifest) as $name => $bundle) {
 				if (!isset($result[$name])) {
 					$bundle['class'] = 'yii\\web\\AssetBundle';
 					$result[$name] = Yii::createObject($bundle);
 				}
 			}
 		}
 		return $result;
 	}
 	protected function loadTargets($targets, $bundles)
 	{
 		// build the dependency order of bundles
 		$registered = array();
 		foreach ($bundles as $name => $bundle) {
 			$this->registerBundle($bundles, $name, $registered);
 		}
 		$bundleOrders = array_combine(array_keys($registered), range(0, count($bundles) - 1));
 		// fill up the target which has empty 'depends'.
 		$referenced = array();
 		foreach ($targets as $name => $target) {
 			if (empty($target['depends'])) {
 				if (!isset($all)) {
 					$all = $name;
 				} else {
 					throw new Exception("Only one target can have empty 'depends' option. Found two now: $all, $name");
 				}
 			} else {
 				foreach ($target['depends'] as $bundle) {
 					if (!isset($referenced[$bundle])) {
 						$referenced[$bundle] = $name;
 					} else {
 						throw new Exception("Target '{$referenced[$bundle]}' and '$name' cannot contain the bundle '$bundle' at the same time.");
 					}
 				}
 			}
 		}
 		if (isset($all)) {
 			$targets[$all]['depends'] = array_diff(array_keys($registered), array_keys($referenced));
 		}
 		// adjust the 'depends' order for each target according to the dependency order of bundles
 		// create an AssetBundle object for each target
 		foreach ($targets as $name => $target) {
 			if (!isset($target['basePath'])) {
 				throw new Exception("Please specify 'basePath' for the '$name' target.");
 			}
 			if (!isset($target['baseUrl'])) {
 				throw new Exception("Please specify 'baseUrl' for the '$name' target.");
 			}
 			usort($target['depends'], function ($a, $b) use ($bundleOrders) {
 				if ($bundleOrders[$a] == $bundleOrders[$b]) {
 					return 0;
 				} else {
 					return $bundleOrders[$a] > $bundleOrders[$b] ? 1 : -1;
 				}
 			});
 			$target['class'] = 'yii\\web\\AssetBundle';
 			$targets[$name] = Yii::createObject($target);
 		}
 		return $targets;
 	}
 	/**
 	 * @param \yii\web\AssetBundle[] $bundles
 	 * @param array $options
 	 */
 	protected function publishBundles($bundles, $options)
 	{
 		if (!isset($options['class'])) {
 			$options['class'] = 'yii\\web\\AssetManager';
 		}
 		$am = Yii::createObject($options);
 		foreach ($bundles as $bundle) {
 			$bundle->publish($am);
 		}
 	}
 	/**
 	 * @param \yii\web\AssetBundle $target
 	 * @param string $type either "js" or "css"
 	 * @param \yii\web\AssetBundle[] $bundles
 	 * @param integer $timestamp
 	 * @throws Exception
 	 */
 	protected function buildTarget($target, $type, $bundles, $timestamp)
 	{
 		$outputFile = strtr($target->$type, array(
 			'{ts}' => $timestamp,
 		));
 		$inputFiles = array();
 		foreach ($target->depends as $name) {
 			if (isset($bundles[$name])) {
 				foreach ($bundles[$name]->$type as $file) {
 					$inputFiles[] = $bundles[$name]->basePath . '/' . $file;
 				}
 			} else {
 				throw new Exception("Unknown bundle: $name");
 			}
 		}
 		if ($type === 'js') {
 			$this->compressJsFiles($inputFiles, $target->basePath . '/' . $outputFile);
 		} else {
 			$this->compressCssFiles($inputFiles, $target->basePath . '/' . $outputFile);
 		}
 		$target->$type = array($outputFile);
 	}
 	protected function adjustDependency($targets, $bundles)
 	{
 		$map = array();
 		foreach ($targets as $name => $target) {
 			foreach ($target->depends as $bundle) {
 				$map[$bundle] = $name;
 			}
 		}
 		foreach ($targets as $name => $target) {
 			$depends = array();
 			foreach ($target->depends as $bn) {
 				foreach ($bundles[$bn]->depends as $bundle) {
 					$depends[$map[$bundle]] = true;
 				}
 			}
 			unset($depends[$name]);
 			$target->depends = array_keys($depends);
 		}
 		// detect possible circular dependencies
 		foreach ($targets as $name => $target) {
 			$registered = array();
 			$this->registerBundle($targets, $name, $registered);
 		}
 		foreach ($map as $bundle => $target) {
 			$targets[$bundle] = Yii::createObject(array(
 				'class' => 'yii\\web\\AssetBundle',
 				'depends' => array($target),
 			));
 		}
 		return $targets;
 	}
 	protected function registerBundle($bundles, $name, &$registered)
 	{
 		if (!isset($registered[$name])) {
 			$registered[$name] = false;
 			$bundle = $bundles[$name];
 			foreach ($bundle->depends as $depend) {
 				$this->registerBundle($bundles, $depend, $registered);
 			}
 			unset($registered[$name]);
 			$registered[$name] = true;
 		} elseif ($registered[$name] === false) {
 			throw new Exception("A circular dependency is detected for target '$name'.");
 		}
 	}
 	protected function saveTargets($targets, $bundleFile)
 	{
 		$array = array();
 		foreach ($targets as $name => $target) {
 			foreach (array('js', 'css', 'depends', 'basePath', 'baseUrl') as $prop) {
 				if (!empty($target->$prop)) {
 					$array[$name][$prop] = $target->$prop;
 				}
 			}
 		}
 		$array = var_export($array, true);
 		$version = date('Y-m-d H:i:s', time());
 		file_put_contents($bundleFile, <<<EOD
 <?php
 /**
 * This file is generated by the "yiic script" command.
 * DO NOT MODIFY THIS FILE DIRECTLY.
 * @version $version
 */
 return $array;
 EOD
 		);
 	}
 	protected function compressJsFiles($inputFiles, $outputFile)
 	{
 		if (is_string($this->jsCompressor)) {
 			$tmpFile = $outputFile . '.tmp';
 			$this->combineJsFiles($inputFiles, $tmpFile);
 			$log = shell_exec(strtr($this->jsCompressor, array(
 				'{from}' => $tmpFile,
 				'{to}' => $outputFile,
 			)));
 			@unlink($tmpFile);
 		} else {
 			$log = call_user_func($this->jsCompressor, $this, $inputFiles, $outputFile);
 		}
 	}
 	protected function compressCssFiles($inputFiles, $outputFile)
 	{
 		if (is_string($this->cssCompressor)) {
 			$tmpFile = $outputFile . '.tmp';
 			$this->combineCssFiles($inputFiles, $tmpFile);
 			$log = shell_exec(strtr($this->cssCompressor, array(
 				'{from}' => $inputFiles,
 				'{to}' => $outputFile,
 			)));
 		} else {
 			$log = call_user_func($this->cssCompressor, $this, $inputFiles, $outputFile);
 		}
 	}
 	public function combineJsFiles($files, $tmpFile)
 	{
 		$content = '';
 		foreach ($files as $file) {
 			$content .= "/*** BEGIN FILE: $file ***/\n"
 				. file_get_contents($file)
 				. "/*** END FILE: $file ***/\n";
 		}
 		file_put_contents($tmpFile, $content);
 	}
 	public function combineCssFiles($files, $tmpFile)
 	{
 		// todo: adjust url() references in CSS files
 		$content = '';
 		foreach ($files as $file) {
 			$content .= "/*** BEGIN FILE: $file ***/\n"
 				. file_get_contents($file)
 				. "/*** END FILE: $file ***/\n";
 		}
 		file_put_contents($tmpFile, $content);
 	}
 	public function actionTemplate($configFile)
 	{
 		$template = <<<EOD
 <?php
 return array(
 	//
 	'bundles' => require('path/to/bundles.php'),
 	//
 	'extensions' => require('path/to/namespaces.php'),
 	//
 	'targets' => array(
 		'all' => array(
 			'basePath' => __DIR__,
 			'baseUrl' => '/test',
 			'js' => 'all-{ts}.js',
 			'css' => 'all-{ts}.css',
 		),
 	),
 	'assetManager' => array(
 		'basePath' => __DIR__,
 		'baseUrl' => '/test',
 	),
 );
 EOD;
 		file_put_contents($configFile, $template);
 	}
 }
--- a/framework/console/webapp/default/index.php
+++ b/framework/console/webapp/default/index.php
@ -1,10 +1,10 @@
 <?php
 define('YII_DEBUG', true);
-$yii = __DIR__.'/../framework/yii.php';
+require __DIR__.'/../framework/yii.php';
-require $yii;
+
 $config = require dirname(__DIR__).'/protected/config/main.php';
 $config['basePath'] = dirname(__DIR__).'/protected';
-$basePath = dirname(__DIR__).'/protected';
+$app = new \yii\web\Application($config);
 $app = new \yii\web\Application('webapp', $basePath, $config);
 $app->run();
--- a/framework/console/webapp/default/protected/config/main.php
+++ b/framework/console/webapp/default/protected/config/main.php
@ -1,5 +1,6 @@
 <?php
 return array(
 	'id' => 'webapp',
 	'name' => 'My Web Application',
 	'components' => array(
@ -12,5 +13,8 @@ return array(
 			'password' => '',
 		),
 		*/
 		'cache' => array(
 			'class' => 'yii\caching\DummyCache',
 		),
 	),
 );
--- a/framework/console/webapp/default/protected/views/layouts/main.php
+++ b/framework/console/webapp/default/protected/views/layouts/main.php
@ -1,11 +1,12 @@
 <?php use yii\helpers\Html as Html; ?>
 <!doctype html>
-<html lang="en">
+<html lang="<?php \Yii::$app->language?>">
 	<head>
 		<meta charset="utf-8" />
-		<title><?php echo $this->context->pageTitle?></title>
+		<title><?php echo Html::encode($this->title)?></title>
 	</head>
 	<body>
-		<h1><?php echo $this->context->pageTitle?></h1>
+		<h1><?php echo Html::encode($this->title)?></h1>
 		<div class="content">
 			<?php echo $content?>
 		</div>
--- a/framework/db/Connection.php
+++ b/framework/db/Connection.php
@ -522,7 +522,7 @@ class Connection extends Component
 				if (isset($matches[3])) {
 					return $db->quoteColumnName($matches[3]);
 				} else {
-					return str_replace('%', $this->tablePrefix, $db->quoteTableName($matches[2]));
+					return str_replace('%', $db->tablePrefix, $db->quoteTableName($matches[2]));
 				}
 			}, $sql);
 	}
--- a/framework/helpers/ArrayHelper.php
+++ b/framework/helpers/ArrayHelper.php
@ -7,9 +7,6 @@
 namespace yii\helpers;
 use Yii;
 use yii\base\InvalidParamException;
 /**
 * ArrayHelper provides additional array functionality you can use in your
 * application.
@ -17,324 +14,6 @@ use yii\base\InvalidParamException;
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
-class ArrayHelper
+class ArrayHelper extends base\ArrayHelper
 {
 	/**
 	 * Merges two or more arrays into one recursively.
 	 * If each array has an element with the same string key value, the latter
 	 * will overwrite the former (different from array_merge_recursive).
 	 * Recursive merging will be conducted if both arrays have an element of array
 	 * type and are having the same key.
 	 * For integer-keyed elements, the elements from the latter array will
 	 * be appended to the former array.
 	 * @param array $a array to be merged to
 	 * @param array $b array to be merged from. You can specify additional
 	 * arrays via third argument, fourth argument etc.
 	 * @return array the merged array (the original arrays are not changed.)
 	 */
 	public static function merge($a, $b)
 	{
 		$args = func_get_args();
 		$res = array_shift($args);
 		while ($args !== array()) {
 			$next = array_shift($args);
 			foreach ($next as $k => $v) {
 				if (is_integer($k)) {
 					isset($res[$k]) ? $res[] = $v : $res[$k] = $v;
 				} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) {
 					$res[$k] = self::merge($res[$k], $v);
 				} else {
 					$res[$k] = $v;
 				}
 			}
 		}
 		return $res;
 	}
 	/**
 	 * Retrieves the value of an array element or object property with the given key or property name.
 	 * If the key does not exist in the array, the default value will be returned instead.
 	 *
 	 * Below are some usage examples,
 	 *
 	 * ~~~
 	 * // working with array
 	 * $username = \yii\helpers\ArrayHelper::getValue($_POST, 'username');
 	 * // working with object
 	 * $username = \yii\helpers\ArrayHelper::getValue($user, 'username');
 	 * // working with anonymous function
 	 * $fullName = \yii\helpers\ArrayHelper::getValue($user, function($user, $defaultValue) {
 	 *     return $user->firstName . ' ' . $user->lastName;
 	 * });
 	 * ~~~
 	 *
 	 * @param array|object $array array or object to extract value from
 	 * @param string|\Closure $key key name of the array element, or property name of the object,
 	 * or an anonymous function returning the value. The anonymous function signature should be:
 	 * `function($array, $defaultValue)`.
 	 * @param mixed $default the default value to be returned if the specified key does not exist
 	 * @return mixed the value of the
 	 */
 	public static function getValue($array, $key, $default = null)
 	{
 		if ($key instanceof \Closure) {
 			return $key($array, $default);
 		} elseif (is_array($array)) {
 			return isset($array[$key]) || array_key_exists($key, $array) ? $array[$key] : $default;
 		} else {
 			return $array->$key;
 		}
 	}
 	/**
 	 * Indexes an array according to a specified key.
 	 * The input array should be multidimensional or an array of objects.
 	 *
 	 * The key can be a key name of the sub-array, a property name of object, or an anonymous
 	 * function which returns the key value given an array element.
 	 *
 	 * If a key value is null, the corresponding array element will be discarded and not put in the result.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'data' => 'abc'),
 	 *     array('id' => '345', 'data' => 'def'),
 	 * );
 	 * $result = ArrayHelper::index($array, 'id');
 	 * // the result is:
 	 * // array(
 	 * //     '123' => array('id' => '123', 'data' => 'abc'),
 	 * //     '345' => array('id' => '345', 'data' => 'def'),
 	 * // )
 	 *
 	 * // using anonymous function
 	 * $result = ArrayHelper::index($array, function(element) {
 	 *     return $element['id'];
 	 * });
 	 * ~~~
 	 *
 	 * @param array $array the array that needs to be indexed
 	 * @param string|\Closure $key the column name or anonymous function whose result will be used to index the array
 	 * @return array the indexed array
 	 */
 	public static function index($array, $key)
 	{
 		$result = array();
 		foreach ($array as $element) {
 			$value = static::getValue($element, $key);
 			$result[$value] = $element;
 		}
 		return $result;
 	}
 	/**
 	 * Returns the values of a specified column in an array.
 	 * The input array should be multidimensional or an array of objects.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'data' => 'abc'),
 	 *     array('id' => '345', 'data' => 'def'),
 	 * );
 	 * $result = ArrayHelper::getColumn($array, 'id');
 	 * // the result is: array( '123', '345')
 	 *
 	 * // using anonymous function
 	 * $result = ArrayHelper::getColumn($array, function(element) {
 	 *     return $element['id'];
 	 * });
 	 * ~~~
 	 *
 	 * @param array $array
 	 * @param string|\Closure $name
 	 * @param boolean $keepKeys whether to maintain the array keys. If false, the resulting array
 	 * will be re-indexed with integers.
 	 * @return array the list of column values
 	 */
 	public static function getColumn($array, $name, $keepKeys = true)
 	{
 		$result = array();
 		if ($keepKeys) {
 			foreach ($array as $k => $element) {
 				$result[$k] = static::getValue($element, $name);
 			}
 		} else {
 			foreach ($array as $element) {
 				$result[] = static::getValue($element, $name);
 			}
 		}
 		return $result;
 	}
 	/**
 	 * Builds a map (key-value pairs) from a multidimensional array or an array of objects.
 	 * The `$from` and `$to` parameters specify the key names or property names to set up the map.
 	 * Optionally, one can further group the map according to a grouping field `$group`.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'name' => 'aaa', 'class' => 'x'),
 	 *     array('id' => '124', 'name' => 'bbb', 'class' => 'x'),
 	 *     array('id' => '345', 'name' => 'ccc', 'class' => 'y'),
 	 * );
 	 *
 	 * $result = ArrayHelper::map($array, 'id', 'name');
 	 * // the result is:
 	 * // array(
 	 * //     '123' => 'aaa',
 	 * //     '124' => 'bbb',
 	 * //     '345' => 'ccc',
 	 * // )
 	 *
 	 * $result = ArrayHelper::map($array, 'id', 'name', 'class');
 	 * // the result is:
 	 * // array(
 	 * //     'x' => array(
 	 * //         '123' => 'aaa',
 	 * //         '124' => 'bbb',
 	 * //     ),
 	 * //     'y' => array(
 	 * //         '345' => 'ccc',
 	 * //     ),
 	 * // )
 	 * ~~~
 	 *
 	 * @param array $array
 	 * @param string|\Closure $from
 	 * @param string|\Closure $to
 	 * @param string|\Closure $group
 	 * @return array
 	 */
 	public static function map($array, $from, $to, $group = null)
 	{
 		$result = array();
 		foreach ($array as $element) {
 			$key = static::getValue($element, $from);
 			$value = static::getValue($element, $to);
 			if ($group !== null) {
 				$result[static::getValue($element, $group)][$key] = $value;
 			} else {
 				$result[$key] = $value;
 			}
 		}
 		return $result;
 	}
 	/**
 	 * Sorts an array of objects or arrays (with the same structure) by one or several keys.
 	 * @param array $array the array to be sorted. The array will be modified after calling this method.
 	 * @param string|\Closure|array $key the key(s) to be sorted by. This refers to a key name of the sub-array
 	 * elements, a property name of the objects, or an anonymous function returning the values for comparison
 	 * purpose. The anonymous function signature should be: `function($item)`.
 	 * To sort by multiple keys, provide an array of keys here.
 	 * @param boolean|array $ascending whether to sort in ascending or descending order. When
 	 * sorting by multiple keys with different ascending orders, use an array of ascending flags.
 	 * @param integer|array $sortFlag the PHP sort flag. Valid values include:
 	 * `SORT_REGULAR`, `SORT_NUMERIC`, `SORT_STRING`, and `SORT_STRING | SORT_FLAG_CASE`. The last
 	 * value is for sorting strings in case-insensitive manner. Please refer to
 	 * See [PHP manual](http://php.net/manual/en/function.sort.php) for more details.
 	 * When sorting by multiple keys with different sort flags, use an array of sort flags.
 	 * @throws InvalidParamException if the $ascending or $sortFlag parameters do not have
 	 * correct number of elements as that of $key.
 	 */
 	public static function multisort(&$array, $key, $ascending = true, $sortFlag = SORT_REGULAR)
 	{
 		$keys = is_array($key) ? $key : array($key);
 		if (empty($keys) || empty($array)) {
 			return;
 		}
 		$n = count($keys);
 		if (is_scalar($ascending)) {
 			$ascending = array_fill(0, $n, $ascending);
 		} elseif (count($ascending) !== $n) {
 			throw new InvalidParamException('The length of $ascending parameter must be the same as that of $keys.');
 		}
 		if (is_scalar($sortFlag)) {
 			$sortFlag = array_fill(0, $n, $sortFlag);
 		} elseif (count($sortFlag) !== $n) {
 			throw new InvalidParamException('The length of $ascending parameter must be the same as that of $keys.');
 		}
 		$args = array();
 		foreach ($keys as $i => $key) {
 			$flag = $sortFlag[$i];
 			if ($flag == (SORT_STRING | SORT_FLAG_CASE)) {
 				$flag = SORT_STRING;
 				$column = array();
 				foreach (static::getColumn($array, $key) as $k => $value) {
 					$column[$k] = strtolower($value);
 				}
 				$args[] = $column;
 			} else {
 				$args[] = static::getColumn($array, $key);
 			}
 			$args[] = $ascending[$i] ? SORT_ASC : SORT_DESC;
 			$args[] = $flag;
 		}
 		$args[] = &$array;
 		call_user_func_array('array_multisort', $args);
 	}
 	/**
 	 * Encodes special characters in an array of strings into HTML entities.
 	 * Both the array keys and values will be encoded.
 	 * If a value is an array, this method will also encode it recursively.
 	 * @param array $data data to be encoded
 	 * @param boolean $valuesOnly whether to encode array values only. If false,
 	 * both the array keys and array values will be encoded.
 	 * @param string $charset the charset that the data is using. If not set,
 	 * [[\yii\base\Application::charset]] will be used.
 	 * @return array the encoded data
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars.php
 	 */
 	public static function htmlEncode($data, $valuesOnly = true, $charset = null)
 	{
 		if ($charset === null) {
 			$charset = Yii::$app->charset;
 		}
 		$d = array();
 		foreach ($data as $key => $value) {
 			if (!$valuesOnly && is_string($key)) {
 				$key = htmlspecialchars($key, ENT_QUOTES, $charset);
 			}
 			if (is_string($value)) {
 				$d[$key] = htmlspecialchars($value, ENT_QUOTES, $charset);
 			} elseif (is_array($value)) {
 				$d[$key] = static::htmlEncode($value, $charset);
 			}
 		}
 		return $d;
 	}
 	/**
 	 * Decodes HTML entities into the corresponding characters in an array of strings.
 	 * Both the array keys and values will be decoded.
 	 * If a value is an array, this method will also decode it recursively.
 	 * @param array $data data to be decoded
 	 * @param boolean $valuesOnly whether to decode array values only. If false,
 	 * both the array keys and array values will be decoded.
 	 * @return array the decoded data
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars-decode.php
 	 */
 	public static function htmlDecode($data, $valuesOnly = true)
 	{
 		$d = array();
 		foreach ($data as $key => $value) {
 			if (!$valuesOnly && is_string($key)) {
 				$key = htmlspecialchars_decode($key, ENT_QUOTES);
 			}
 			if (is_string($value)) {
 				$d[$key] = htmlspecialchars_decode($value, ENT_QUOTES);
 			} elseif (is_array($value)) {
 				$d[$key] = static::htmlDecode($value);
 			}
 		}
 		return $d;
 	}
 }
--- a/framework/helpers/ConsoleColor.php
+++ b/framework/helpers/ConsoleColor.php
@ -18,453 +18,6 @@ namespace yii\helpers;
 * @author Carsten Brandt <mail@cebe.cc>
 * @since 2.0
 */
-class ConsoleColor
+class ConsoleColor extends base\ConsoleColor
 {
 	const FG_BLACK = 30;
 	const FG_RED = 31;
 	const FG_GREEN = 32;
 	const FG_YELLOW = 33;
 	const FG_BLUE = 34;
 	const FG_PURPLE = 35;
 	const FG_CYAN = 36;
 	const FG_GREY = 37;
 	const BG_BLACK = 40;
 	const BG_RED = 41;
 	const BG_GREEN = 42;
 	const BG_YELLOW = 43;
 	const BG_BLUE = 44;
 	const BG_PURPLE = 45;
 	const BG_CYAN = 46;
 	const BG_GREY = 47;
 	const BOLD = 1;
 	const ITALIC = 3;
 	const UNDERLINE = 4;
 	const BLINK = 5;
 	const NEGATIVE = 7;
 	const CONCEALED = 8;
 	const CROSSED_OUT = 9;
 	const FRAMED = 51;
 	const ENCIRCLED = 52;
 	const OVERLINED = 53;
 	/**
 	 * Moves the terminal cursor up by sending ANSI control code CUU to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $rows number of rows the cursor should be moved up
 	 */
 	public static function moveCursorUp($rows=1)
 	{
 		echo "\033[" . (int) $rows . 'A';
 	}
 	/**
 	 * Moves the terminal cursor down by sending ANSI control code CUD to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $rows number of rows the cursor should be moved down
 	 */
 	public static function moveCursorDown($rows=1)
 	{
 		echo "\033[" . (int) $rows . 'B';
 	}
 	/**
 	 * Moves the terminal cursor forward by sending ANSI control code CUF to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $steps number of steps the cursor should be moved forward
 	 */
 	public static function moveCursorForward($steps=1)
 	{
 		echo "\033[" . (int) $steps . 'C';
 	}
 	/**
 	 * Moves the terminal cursor backward by sending ANSI control code CUB to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $steps number of steps the cursor should be moved backward
 	 */
 	public static function moveCursorBackward($steps=1)
 	{
 		echo "\033[" . (int) $steps . 'D';
 	}
 	/**
 	 * Moves the terminal cursor to the beginning of the next line by sending ANSI control code CNL to the terminal.
 	 * @param integer $lines number of lines the cursor should be moved down
 	 */
 	public static function moveCursorNextLine($lines=1)
 	{
 		echo "\033[" . (int) $lines . 'E';
 	}
 	/**
 	 * Moves the terminal cursor to the beginning of the previous line by sending ANSI control code CPL to the terminal.
 	 * @param integer $lines number of lines the cursor should be moved up
 	 */
 	public static function moveCursorPrevLine($lines=1)
 	{
 		echo "\033[" . (int) $lines . 'F';
 	}
 	/**
 	 * Moves the cursor to an absolute position given as column and row by sending ANSI control code CUP or CHA to the terminal.
 	 * @param integer $column 1-based column number, 1 is the left edge of the screen.
 	 * @param integer|null $row 1-based row number, 1 is the top edge of the screen. if not set, will move cursor only in current line.
 	 */
 	public static function moveCursorTo($column, $row=null)
 	{
 		if ($row === null) {
 			echo "\033[" . (int) $column . 'G';
 		} else {
 			echo "\033[" . (int) $row . ';' . (int) $column . 'H';
 		}
 	}
 	/**
 	 * Scrolls whole page up by sending ANSI control code SU to the terminal.
 	 * New lines are added at the bottom. This is not supported by ANSI.SYS used in windows.
 	 * @param int $lines number of lines to scroll up
 	 */
 	public static function scrollUp($lines=1)
 	{
 		echo "\033[".(int)$lines."S";
 	}
 	/**
 	 * Scrolls whole page down by sending ANSI control code SD to the terminal.
 	 * New lines are added at the top. This is not supported by ANSI.SYS used in windows.
 	 * @param int $lines number of lines to scroll down
 	 */
 	public static function scrollDown($lines=1)
 	{
 		echo "\033[".(int)$lines."T";
 	}
 	/**
 	 * Saves the current cursor position by sending ANSI control code SCP to the terminal.
 	 * Position can then be restored with {@link restoreCursorPosition}.
 	 */
 	public static function saveCursorPosition()
 	{
 		echo "\033[s";
 	}
 	/**
 	 * Restores the cursor position saved with {@link saveCursorPosition} by sending ANSI control code RCP to the terminal.
 	 */
 	public static function restoreCursorPosition()
 	{
 		echo "\033[u";
 	}
 	/**
 	 * Hides the cursor by sending ANSI DECTCEM code ?25l to the terminal.
 	 * Use {@link showCursor} to bring it back.
 	 * Do not forget to show cursor when your application exits. Cursor might stay hidden in terminal after exit.
 	 */
 	public static function hideCursor()
 	{
 		echo "\033[?25l";
 	}
 	/**
 	 * Will show a cursor again when it has been hidden by {@link hideCursor}  by sending ANSI DECTCEM code ?25h to the terminal.
 	 */
 	public static function showCursor()
 	{
 		echo "\033[?25h";
 	}
 	/**
 	 * Clears entire screen content by sending ANSI control code ED with argument 2 to the terminal.
 	 * Cursor position will not be changed.
 	 * **Note:** ANSI.SYS implementation used in windows will reset cursor position to upper left corner of the screen.
 	 */
 	public static function clearScreen()
 	{
 		echo "\033[2J";
 	}
 	/**
 	 * Clears text from cursor to the beginning of the screen by sending ANSI control code ED with argument 1 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearScreenBeforeCursor()
 	{
 		echo "\033[1J";
 	}
 	/**
 	 * Clears text from cursor to the end of the screen by sending ANSI control code ED with argument 0 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearScreenAfterCursor()
 	{
 		echo "\033[0J";
 	}
 	/**
 	 * Clears the line, the cursor is currently on by sending ANSI control code EL with argument 2 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLine()
 	{
 		echo "\033[2K";
 	}
 	/**
 	 * Clears text from cursor position to the beginning of the line by sending ANSI control code EL with argument 1 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLineBeforeCursor()
 	{
 		echo "\033[1K";
 	}
 	/**
 	 * Clears text from cursor position to the end of the line by sending ANSI control code EL with argument 0 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLineAfterCursor()
 	{
 		echo "\033[0K";
 	}
 	/**
 	 * Will send ANSI format for following output
 	 *
 	 * You can pass any of the FG_*, BG_* and TEXT_* constants and also xterm256ColorBg
 	 * TODO: documentation
 	 */
 	public static function ansiStyle()
 	{
 		echo "\033[" . implode(';', func_get_args()) . 'm';
 	}
 	/**
 	 * Will return a string formatted with the given ANSI style
 	 *
 	 * See {@link ansiStyle} for possible arguments.
 	 * @param string $string the string to be formatted
 	 * @return string
 	 */
 	public static function ansiStyleString($string)
 	{
 		$args = func_get_args();
 		array_shift($args);
 		$code = implode(';', $args);
 		return "\033[0m" . ($code !== '' ? "\033[" . $code . "m" : '') . $string."\033[0m";
 	}
 	//const COLOR_XTERM256 = 38;// http://en.wikipedia.org/wiki/Talk:ANSI_escape_code#xterm-256colors
 	public static function xterm256ColorFg($i) // TODO naming!
 	{
 		return '38;5;'.$i;
 	}
 	public static function xterm256ColorBg($i) // TODO naming!
 	{
 		return '48;5;'.$i;
 	}
 	/**
 	 * Usage: list($w, $h) = ConsoleHelper::getScreenSize();
 	 *
 	 * @return array
 	 */
 	public static function getScreenSize()
 	{
 		// TODO implement
 		return array(150,50);
 	}
 	/**
 	 * resets any ansi style set by previous method {@link ansiStyle}
 	 * Any output after this is will have default text style.
 	 */
 	public static function reset()
 	{
 		echo "\033[0m";
 	}
 	/**
 	 * Strips ANSI control codes from a string
 	 *
 	 * @param string $string String to strip
 	 * @return string
 	 */
 	public static function strip($string)
 	{
 		return preg_replace('/\033\[[\d;]+m/', '', $string); // TODO currently only strips color
 	}
 	// TODO refactor and review
 	public static function ansiToHtml($string)
 	{
 		$tags = 0;
 		return preg_replace_callback('/\033\[[\d;]+m/', function($ansi) use (&$tags) {
 			$styleA = array();
 			foreach(explode(';', $ansi) as $controlCode)
 			{
 				switch($controlCode)
 				{
 					case static::FG_BLACK:  $style = array('color' => '#000000'); break;
 					case static::FG_BLUE:   $style = array('color' => '#000078'); break;
 					case static::FG_CYAN:   $style = array('color' => '#007878'); break;
 					case static::FG_GREEN:  $style = array('color' => '#007800'); break;
 					case static::FG_GREY:   $style = array('color' => '#787878'); break;
 					case static::FG_PURPLE: $style = array('color' => '#780078'); break;
 					case static::FG_RED:    $style = array('color' => '#780000'); break;
 					case static::FG_YELLOW: $style = array('color' => '#787800'); break;
 					case static::BG_BLACK:  $style = array('background-color' => '#000000'); break;
 					case static::BG_BLUE:   $style = array('background-color' => '#000078'); break;
 					case static::BG_CYAN:   $style = array('background-color' => '#007878'); break;
 					case static::BG_GREEN:  $style = array('background-color' => '#007800'); break;
 					case static::BG_GREY:   $style = array('background-color' => '#787878'); break;
 					case static::BG_PURPLE: $style = array('background-color' => '#780078'); break;
 					case static::BG_RED:    $style = array('background-color' => '#780000'); break;
 					case static::BG_YELLOW: $style = array('background-color' => '#787800'); break;
 					case static::BOLD:       $style = array('font-weight' => 'bold'); break;
 					case static::ITALIC:     $style = array('font-style' => 'italic'); break;
 					case static::UNDERLINE:  $style = array('text-decoration' => array('underline')); break;
 					case static::OVERLINED:  $style = array('text-decoration' => array('overline')); break;
 					case static::CROSSED_OUT:$style = array('text-decoration' => array('line-through')); break;
 					case static::BLINK:      $style = array('text-decoration' => array('blink')); break;
 					case static::NEGATIVE:   // ???
 					case static::CONCEALED:
 					case static::ENCIRCLED:
 					case static::FRAMED:
 					// TODO allow resetting codes
 					break;
 					case 0: // ansi reset
 						$return = '';
 						for($n=$tags; $tags>0; $tags--) {
 							$return .= '</span>';
 						}
 						return $return;
 				}
 				$styleA = ArrayHelper::merge($styleA, $style);
 			}
 			$styleString[] = array();
 			foreach($styleA as $name => $content) {
 				if ($name === 'text-decoration') {
 					$content = implode(' ', $content);
 				}
 				$styleString[] = $name.':'.$content;
 			}
 			$tags++;
 			return '<span' . (!empty($styleString) ? 'style="' . implode(';', $styleString) : '') . '>';
 		}, $string);
 	}
 	/**
 	 * TODO syntax copied from https://github.com/pear/Console_Color2/blob/master/Console/Color2.php
 	 *
 	 * Converts colorcodes in the format %y (for yellow) into ansi-control
 	 * codes. The conversion table is: ('bold' meaning 'light' on some
 	 * terminals). It's almost the same conversion table irssi uses.
 	 * <pre>
 	 *                  text      text            background
 	 *      ------------------------------------------------
 	 *      %k %K %0    black     dark grey       black
 	 *      %r %R %1    red       bold red        red
 	 *      %g %G %2    green     bold green      green
 	 *      %y %Y %3    yellow    bold yellow     yellow
 	 *      %b %B %4    blue      bold blue       blue
 	 *      %m %M %5    magenta   bold magenta    magenta
 	 *      %p %P       magenta (think: purple)
 	 *      %c %C %6    cyan      bold cyan       cyan
 	 *      %w %W %7    white     bold white      white
 	 *
 	 *      %F     Blinking, Flashing
 	 *      %U     Underline
 	 *      %8     Reverse
 	 *      %_,%9  Bold
 	 *
 	 *      %n     Resets the color
 	 *      %%     A single %
 	 * </pre>
 	 * First param is the string to convert, second is an optional flag if
 	 * colors should be used. It defaults to true, if set to false, the
 	 * colorcodes will just be removed (And %% will be transformed into %)
 	 *
 	 * @param string $string  String to convert
 	 * @param bool   $colored Should the string be colored?
 	 *
 	 * @return string
 	 */
 	public static function renderColoredString($string)
 	{
 		$colored = true;
 		static $conversions = array ( // static so the array doesn't get built
 		   // everytime
 		// %y - yellow, and so on... {{{
 		'%y' => array('color' => 'yellow'),
 		'%g' => array('color' => 'green' ),
 		'%b' => array('color' => 'blue'  ),
 		'%r' => array('color' => 'red'   ),
 		'%p' => array('color' => 'purple'),
 		'%m' => array('color' => 'purple'),
 		'%c' => array('color' => 'cyan'  ),
 		'%w' => array('color' => 'grey'  ),
 		'%k' => array('color' => 'black' ),
 		'%n' => array('color' => 'reset' ),
 		'%Y' => array('color' => 'yellow',  'style' => 'light'),
 		'%G' => array('color' => 'green',   'style' => 'light'),
 		'%B' => array('color' => 'blue',    'style' => 'light'),
 		'%R' => array('color' => 'red',     'style' => 'light'),
 		'%P' => array('color' => 'purple',  'style' => 'light'),
 		'%M' => array('color' => 'purple',  'style' => 'light'),
 		'%C' => array('color' => 'cyan',    'style' => 'light'),
 		'%W' => array('color' => 'grey',    'style' => 'light'),
 		'%K' => array('color' => 'black',   'style' => 'light'),
 		'%N' => array('color' => 'reset',   'style' => 'light'),
 		'%3' => array('background' => 'yellow'),
 		'%2' => array('background' => 'green' ),
 		'%4' => array('background' => 'blue'  ),
 		'%1' => array('background' => 'red'   ),
 		'%5' => array('background' => 'purple'),
 		'%6' => array('background' => 'cyan'  ),
 		'%7' => array('background' => 'grey'  ),
 		'%0' => array('background' => 'black' ),
 		// Don't use this, I can't stand flashing text
 		'%F' => array('style' => 'blink'),
 		'%U' => array('style' => 'underline'),
 		'%8' => array('style' => 'inverse'),
 		'%9' => array('style' => 'bold'),
 		'%_' => array('style' => 'bold')
 		// }}}
 		);
 		if ($colored) {
 			$string = str_replace('%%', '% ', $string);
 			foreach ($conversions as $key => $value) {
 				$string = str_replace($key, Console_Color::color($value),
 				$string);
 			}
 			$string = str_replace('% ', '%', $string);
 		} else {
 			$string = preg_replace('/%((%)|.)/', '$2', $string);
 		}
 		return $string;
 	}
 	/**
 	 * Escapes % so they don't get interpreted as color codes
 	 *
 	 * @param string $string String to escape
 	 *
 	 * @access public
 	 * @return string
 	 */
 	public static function escape($string)
 	{
 		return str_replace('%', '%%', $string);
 	}
 }
--- a/framework/helpers/FileHelper.php
+++ b/framework/helpers/FileHelper.php
@ -9,9 +9,6 @@
 namespace yii\helpers;
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
 /**
 * Filesystem helper
 *
@ -19,256 +16,6 @@ use yii\base\InvalidConfigException;
 * @author Alex Makarov <sam@rmcreative.ru>
 * @since 2.0
 */
-class FileHelper
+class FileHelper extends base\FileHelper
 {
 	/**
 	 * Returns the extension name of a file path.
 	 * For example, the path "path/to/something.php" would return "php".
 	 * @param string $path the file path
 	 * @return string the extension name without the dot character.
 	 */
 	public static function getExtension($path)
 	{
 		return pathinfo($path, PATHINFO_EXTENSION);
 	}
 	/**
 	 * Checks the given path and ensures it is a directory.
 	 * This method will call `realpath()` to "normalize" the given path.
 	 * If the given path does not refer to an existing directory, an exception will be thrown.
 	 * @param string $path the given path. This can also be a path alias.
 	 * @return string the normalized path
 	 * @throws InvalidConfigException if the path does not refer to an existing directory.
 	 */
 	public static function ensureDirectory($path)
 	{
 		$p = \Yii::getAlias($path);
 		if (($p = realpath($p)) !== false && is_dir($p)) {
 			return $p;
 		} else {
 			throw new InvalidConfigException('Directory does not exist: ' . $path);
 		}
 	}
 	/**
 	 * Normalizes a file/directory path.
 	 * After normalization, the directory separators in the path will be `DIRECTORY_SEPARATOR`,
 	 * and any trailing directory separators will be removed. For example, '/home\demo/' on Linux
 	 * will be normalized as '/home/demo'.
 	 * @param string $path the file/directory path to be normalized
 	 * @param string $ds the directory separator to be used in the normalized result. Defaults to `DIRECTORY_SEPARATOR`.
 	 * @return string the normalized file/directory path
 	 */
 	public static function normalizePath($path, $ds = DIRECTORY_SEPARATOR)
 	{
 		return rtrim(strtr($path, array('/' => $ds, '\\' => $ds)), $ds);
 	}
 	/**
 	 * Returns the localized version of a specified file.
 	 *
 	 * The searching is based on the specified language code. In particular,
 	 * a file with the same name will be looked for under the subdirectory
 	 * whose name is same as the language code. For example, given the file "path/to/view.php"
 	 * and language code "zh_cn", the localized file will be looked for as
 	 * "path/to/zh_cn/view.php". If the file is not found, the original file
 	 * will be returned.
 	 *
 	 * If the target and the source language codes are the same,
 	 * the original file will be returned.
 	 *
 	 * For consistency, it is recommended that the language code is given
 	 * in lower case and in the format of LanguageID_RegionID (e.g. "en_us").
 	 *
 	 * @param string $file the original file
 	 * @param string $language the target language that the file should be localized to.
 	 * If not set, the value of [[\yii\base\Application::language]] will be used.
 	 * @param string $sourceLanguage the language that the original file is in.
 	 * If not set, the value of [[\yii\base\Application::sourceLanguage]] will be used.
 	 * @return string the matching localized file, or the original file if the localized version is not found.
 	 * If the target and the source language codes are the same, the original file will be returned.
 	 */
 	public static function localize($file, $language = null, $sourceLanguage = null)
 	{
 		if ($language === null) {
 			$language = \Yii::$app->language;
 		}
 		if ($sourceLanguage === null) {
 			$sourceLanguage = \Yii::$app->sourceLanguage;
 		}
 		if ($language === $sourceLanguage) {
 			return $file;
 		}
 		$desiredFile = dirname($file) . DIRECTORY_SEPARATOR . $sourceLanguage . DIRECTORY_SEPARATOR . basename($file);
 		return is_file($desiredFile) ? $desiredFile : $file;
 	}
 	/**
 	 * Determines the MIME type of the specified file.
 	 * This method will first try to determine the MIME type based on
 	 * [finfo_open](http://php.net/manual/en/function.finfo-open.php). If this doesn't work, it will
 	 * fall back to [[getMimeTypeByExtension()]].
 	 * @param string $file the file name.
 	 * @param string $magicFile name of the optional magic database file, usually something like `/path/to/magic.mime`.
 	 * This will be passed as the second parameter to [finfo_open](http://php.net/manual/en/function.finfo-open.php).
 	 * @param boolean $checkExtension whether to use the file extension to determine the MIME type in case
 	 * `finfo_open()` cannot determine it.
 	 * @return string the MIME type (e.g. `text/plain`). Null is returned if the MIME type cannot be determined.
 	 */
 	public static function getMimeType($file, $magicFile = null, $checkExtension = true)
 	{
 		if (function_exists('finfo_open')) {
 			$info = finfo_open(FILEINFO_MIME_TYPE, $magicFile);
 			if ($info && ($result = finfo_file($info, $file)) !== false) {
 				return $result;
 			}
 		}
 		return $checkExtension ? self::getMimeTypeByExtension($file) : null;
 	}
 	/**
 	 * Determines the MIME type based on the extension name of the specified file.
 	 * This method will use a local map between extension names and MIME types.
 	 * @param string $file the file name.
 	 * @param string $magicFile the path of the file that contains all available MIME type information.
 	 * If this is not set, the default file aliased by `@yii/util/mimeTypes.php` will be used.
 	 * @return string the MIME type. Null is returned if the MIME type cannot be determined.
 	 */
 	public static function getMimeTypeByExtension($file, $magicFile = null)
 	{
 		if ($magicFile === null) {
 			$magicFile = \Yii::getAlias('@yii/util/mimeTypes.php');
 		}
 		$mimeTypes = require($magicFile);
 		if (($ext = pathinfo($file, PATHINFO_EXTENSION)) !== '') {
 			$ext = strtolower($ext);
 			if (isset($mimeTypes[$ext])) {
 				return $mimeTypes[$ext];
 			}
 		}
 		return null;
 	}
 	/**
 	 * Copies a list of files from one place to another.
 	 * @param array $fileList the list of files to be copied (name=>spec).
 	 * The array keys are names displayed during the copy process, and array values are specifications
 	 * for files to be copied. Each array value must be an array of the following structure:
 	 * <ul>
 	 * <li>source: required, the full path of the file/directory to be copied from</li>
 	 * <li>target: required, the full path of the file/directory to be copied to</li>
 	 * <li>callback: optional, the callback to be invoked when copying a file. The callback function
 	 *   should be declared as follows:
 	 *   <pre>
 	 *   function foo($source,$params)
 	 *   </pre>
 	 *   where $source parameter is the source file path, and the content returned
 	 *   by the function will be saved into the target file.</li>
 	 * <li>params: optional, the parameters to be passed to the callback</li>
 	 * </ul>
 	 * @see buildFileList
 	 */
 	public static function copyFiles($fileList)
 	{
 		$overwriteAll = false;
 		foreach($fileList as $name=>$file) {
 			$source = strtr($file['source'], '/\\', DIRECTORY_SEPARATOR);
 			$target = strtr($file['target'], '/\\', DIRECTORY_SEPARATOR);
 			$callback = isset($file['callback']) ? $file['callback'] : null;
 			$params = isset($file['params']) ? $file['params'] : null;
 			if(is_dir($source)) {
 				try {
 					self::ensureDirectory($target);
 				}
 				catch (Exception $e) {
 					mkdir($target, true, 0777);
 				}
 				continue;
 			}
 			if($callback !== null) {
 				$content = call_user_func($callback, $source, $params);
 			}
 			else {
 				$content = file_get_contents($source);
 			}
 			if(is_file($target)) {
 				if($content === file_get_contents($target)) {
 					echo "  unchanged $name\n";
 					continue;
 				}
 				if($overwriteAll) {
 					echo "  overwrite $name\n";
 				}
 				else {
 					echo "      exist $name\n";
 					echo "            ...overwrite? [Yes|No|All|Quit] ";
 					$answer = trim(fgets(STDIN));
 					if(!strncasecmp($answer, 'q', 1)) {
 						return;
 					}
 					elseif(!strncasecmp($answer, 'y', 1)) {
 						echo "  overwrite $name\n";
 					}
 					elseif(!strncasecmp($answer, 'a', 1)) {
 						echo "  overwrite $name\n";
 						$overwriteAll = true;
 					}
 					else {
 						echo "       skip $name\n";
 						continue;
 					}
 				}
 			}
 			else {
 				try {
 					self::ensureDirectory(dirname($target));
 				}
 				catch (Exception $e) {
 					mkdir(dirname($target), true, 0777);
 				}
 				echo "   generate $name\n";
 			}
 			file_put_contents($target, $content);
 		}
 	}
 	/**
 	 * Builds the file list of a directory.
 	 * This method traverses through the specified directory and builds
 	 * a list of files and subdirectories that the directory contains.
 	 * The result of this function can be passed to {@link copyFiles}.
 	 * @param string $sourceDir the source directory
 	 * @param string $targetDir the target directory
 	 * @param string $baseDir base directory
 	 * @param array $ignoreFiles list of the names of files that should
 	 * be ignored in list building process. Argument available since 1.1.11.
 	 * @param array $renameMap hash array of file names that should be
 	 * renamed. Example value: array('1.old.txt'=>'2.new.txt').
 	 * @return array the file list (see {@link copyFiles})
 	 */
 	public static function buildFileList($sourceDir, $targetDir, $baseDir='', $ignoreFiles=array(), $renameMap=array())
 	{
 		$list = array();
 		$handle = opendir($sourceDir);
 		while(($file = readdir($handle)) !== false) {
 			if(in_array($file, array('.', '..', '.svn', '.gitignore')) || in_array($file, $ignoreFiles)) {
 				continue;
 			}
 			$sourcePath = $sourceDir.DIRECTORY_SEPARATOR.$file;
 			$targetPath = $targetDir.DIRECTORY_SEPARATOR.strtr($file, $renameMap);
 			$name = $baseDir === '' ? $file : $baseDir.'/'.$file;
 			$list[$name] = array(
 				'source' => $sourcePath,
 				'target' => $targetPath,
 			);
 			if(is_dir($sourcePath)) {
 				$list = array_merge($list, self::buildFileList($sourcePath, $targetPath, $name, $ignoreFiles, $renameMap));
 			}
 		}
 		closedir($handle);
 		return $list;
 	}
 }
--- a/framework/helpers/Html.php
+++ b/framework/helpers/Html.php
@ -7,975 +7,12 @@
 namespace yii\helpers;
 use Yii;
 use yii\base\InvalidParamException;
 /**
 * Html provides a set of static methods for generating commonly used HTML tags.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
-class Html
+class Html extends base\Html
 {
 	/**
 	 * @var boolean whether to close void (empty) elements. Defaults to true.
 	 * @see voidElements
 	 */
 	public static $closeVoidElements = true;
 	/**
 	 * @var array list of void elements (element name => 1)
 	 * @see closeVoidElements
 	 * @see http://www.w3.org/TR/html-markup/syntax.html#void-element
 	 */
 	public static $voidElements = array(
 		'area' => 1,
 		'base' => 1,
 		'br' => 1,
 		'col' => 1,
 		'command' => 1,
 		'embed' => 1,
 		'hr' => 1,
 		'img' => 1,
 		'input' => 1,
 		'keygen' => 1,
 		'link' => 1,
 		'meta' => 1,
 		'param' => 1,
 		'source' => 1,
 		'track' => 1,
 		'wbr' => 1,
 	);
 	/**
 	 * @var boolean whether to show the values of boolean attributes in element tags.
 	 * If false, only the attribute names will be generated.
 	 * @see booleanAttributes
 	 */
 	public static $showBooleanAttributeValues = true;
 	/**
 	 * @var array list of boolean attributes. The presence of a boolean attribute on
 	 * an element represents the true value, and the absence of the attribute represents the false value.
 	 * @see showBooleanAttributeValues
 	 * @see http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes
 	 */
 	public static $booleanAttributes = array(
 		'async' => 1,
 		'autofocus' => 1,
 		'autoplay' => 1,
 		'checked' => 1,
 		'controls' => 1,
 		'declare' => 1,
 		'default' => 1,
 		'defer' => 1,
 		'disabled' => 1,
 		'formnovalidate' => 1,
 		'hidden' => 1,
 		'ismap' => 1,
 		'loop' => 1,
 		'multiple' => 1,
 		'muted' => 1,
 		'nohref' => 1,
 		'noresize' => 1,
 		'novalidate' => 1,
 		'open' => 1,
 		'readonly' => 1,
 		'required' => 1,
 		'reversed' => 1,
 		'scoped' => 1,
 		'seamless' => 1,
 		'selected' => 1,
 		'typemustmatch' => 1,
 	);
 	/**
 	 * @var array the preferred order of attributes in a tag. This mainly affects the order of the attributes
 	 * that are rendered by [[renderAttributes()]].
 	 */
 	public static $attributeOrder = array(
 		'type',
 		'id',
 		'class',
 		'name',
 		'value',
 		'href',
 		'src',
 		'action',
 		'method',
 		'selected',
 		'checked',
 		'readonly',
 		'disabled',
 		'multiple',
 		'size',
 		'maxlength',
 		'width',
 		'height',
 		'rows',
 		'cols',
 		'alt',
 		'title',
 		'rel',
 		'media',
 	);
 	/**
 	 * Encodes special characters into HTML entities.
 	 * The [[yii\base\Application::charset|application charset]] will be used for encoding.
 	 * @param string $content the content to be encoded
 	 * @return string the encoded content
 	 * @see decode
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars.php
 	 */
 	public static function encode($content)
 	{
 		return htmlspecialchars($content, ENT_QUOTES, Yii::$app->charset);
 	}
 	/**
 	 * Decodes special HTML entities back to the corresponding characters.
 	 * This is the opposite of [[encode()]].
 	 * @param string $content the content to be decoded
 	 * @return string the decoded content
 	 * @see encode
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars-decode.php
 	 */
 	public static function decode($content)
 	{
 		return htmlspecialchars_decode($content, ENT_QUOTES);
 	}
 	/**
 	 * Generates a complete HTML tag.
 	 * @param string $name the tag name
 	 * @param string $content the content to be enclosed between the start and end tags. It will not be HTML-encoded.
 	 * If this is coming from end users, you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated HTML tag
 	 * @see beginTag
 	 * @see endTag
 	 */
 	public static function tag($name, $content = '', $options = array())
 	{
 		$html = '<' . $name . static::renderTagAttributes($options);
 		if (isset(static::$voidElements[strtolower($name)])) {
 			return $html . (static::$closeVoidElements ? ' />' : '>');
 		} else {
 			return $html . ">$content</$name>";
 		}
 	}
 	/**
 	 * Generates a start tag.
 	 * @param string $name the tag name
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated start tag
 	 * @see endTag
 	 * @see tag
 	 */
 	public static function beginTag($name, $options = array())
 	{
 		return '<' . $name . static::renderTagAttributes($options) . '>';
 	}
 	/**
 	 * Generates an end tag.
 	 * @param string $name the tag name
 	 * @return string the generated end tag
 	 * @see beginTag
 	 * @see tag
 	 */
 	public static function endTag($name)
 	{
 		return "</$name>";
 	}
 	/**
 	 * Encloses the given content within a CDATA tag.
 	 * @param string $content the content to be enclosed within the CDATA tag
 	 * @return string the CDATA tag with the enclosed content.
 	 */
 	public static function cdata($content)
 	{
 		return '<![CDATA[' . $content . ']]>';
 	}
 	/**
 	 * Generates a style tag.
 	 * @param string $content the style content
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "text/css" will be used.
 	 * @return string the generated style tag
 	 */
 	public static function style($content, $options = array())
 	{
 		if (!isset($options['type'])) {
 			$options['type'] = 'text/css';
 		}
 		return static::tag('style', "/*<![CDATA[*/\n{$content}\n/*]]>*/", $options);
 	}
 	/**
 	 * Generates a script tag.
 	 * @param string $content the script content
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "text/javascript" will be rendered.
 	 * @return string the generated script tag
 	 */
 	public static function script($content, $options = array())
 	{
 		if (!isset($options['type'])) {
 			$options['type'] = 'text/javascript';
 		}
 		return static::tag('script', "/*<![CDATA[*/\n{$content}\n/*]]>*/", $options);
 	}
 	/**
 	 * Generates a link tag that refers to an external CSS file.
 	 * @param array|string $url the URL of the external CSS file. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated link tag
 	 * @see url
 	 */
 	public static function cssFile($url, $options = array())
 	{
 		$options['rel'] = 'stylesheet';
 		$options['type'] = 'text/css';
 		$options['href'] = static::url($url);
 		return static::tag('link', '', $options);
 	}
 	/**
 	 * Generates a script tag that refers to an external JavaScript file.
 	 * @param string $url the URL of the external JavaScript file. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated script tag
 	 * @see url
 	 */
 	public static function jsFile($url, $options = array())
 	{
 		$options['type'] = 'text/javascript';
 		$options['src'] = static::url($url);
 		return static::tag('script', '', $options);
 	}
 	/**
 	 * Generates a form start tag.
 	 * @param array|string $action the form action URL. This parameter will be processed by [[url()]].
 	 * @param string $method the form submission method, either "post" or "get" (case-insensitive)
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated form start tag.
 	 * @see endForm
 	 */
 	public static function beginForm($action = '', $method = 'post', $options = array())
 	{
 		$action = static::url($action);
 		// query parameters in the action are ignored for GET method
 		// we use hidden fields to add them back
 		$hiddens = array();
 		if (!strcasecmp($method, 'get') && ($pos = strpos($action, '?')) !== false) {
 			foreach (explode('&', substr($action, $pos + 1)) as $pair) {
 				if (($pos1 = strpos($pair, '=')) !== false) {
 					$hiddens[] = static::hiddenInput(urldecode(substr($pair, 0, $pos1)), urldecode(substr($pair, $pos1 + 1)));
 				} else {
 					$hiddens[] = static::hiddenInput(urldecode($pair), '');
 				}
 			}
 			$action = substr($action, 0, $pos);
 		}
 		$options['action'] = $action;
 		$options['method'] = $method;
 		$form = static::beginTag('form', $options);
 		if ($hiddens !== array()) {
 			$form .= "\n" . implode("\n", $hiddens);
 		}
 		return $form;
 	}
 	/**
 	 * Generates a form end tag.
 	 * @return string the generated tag
 	 * @see beginForm
 	 */
 	public static function endForm()
 	{
 		return '</form>';
 	}
 	/**
 	 * Generates a hyperlink tag.
 	 * @param string $text link body. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param array|string|null $url the URL for the hyperlink tag. This parameter will be processed by [[url()]]
 	 * and will be used for the "href" attribute of the tag. If this parameter is null, the "href" attribute
 	 * will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated hyperlink
 	 * @see url
 	 */
 	public static function a($text, $url = null, $options = array())
 	{
 		if ($url !== null) {
 			$options['href'] = static::url($url);
 		}
 		return static::tag('a', $text, $options);
 	}
 	/**
 	 * Generates a mailto hyperlink.
 	 * @param string $text link body. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param string $email email address. If this is null, the first parameter (link body) will be treated
 	 * as the email address and used.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated mailto link
 	 */
 	public static function mailto($text, $email = null, $options = array())
 	{
 		return static::a($text, 'mailto:' . ($email === null ? $text : $email), $options);
 	}
 	/**
 	 * Generates an image tag.
 	 * @param string $src the image URL. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated image tag
 	 */
 	public static function img($src, $options = array())
 	{
 		$options['src'] = static::url($src);
 		if (!isset($options['alt'])) {
 			$options['alt'] = '';
 		}
 		return static::tag('img', null, $options);
 	}
 	/**
 	 * Generates a label tag.
 	 * @param string $content label text. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param string $for the ID of the HTML element that this label is associated with.
 	 * If this is null, the "for" attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated label tag
 	 */
 	public static function label($content, $for = null, $options = array())
 	{
 		$options['for'] = $for;
 		return static::tag('label', $content, $options);
 	}
 	/**
 	 * Generates a button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "button" will be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function button($name = null, $value = null, $content = 'Button', $options = array())
 	{
 		$options['name'] = $name;
 		$options['value'] = $value;
 		if (!isset($options['type'])) {
 			$options['type'] = 'button';
 		}
 		return static::tag('button', $content, $options);
 	}
 	/**
 	 * Generates a submit button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated submit button tag
 	 */
 	public static function submitButton($name = null, $value = null, $content = 'Submit', $options = array())
 	{
 		$options['type'] = 'submit';
 		return static::button($name, $value, $content, $options);
 	}
 	/**
 	 * Generates a reset button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated reset button tag
 	 */
 	public static function resetButton($name = null, $value = null, $content = 'Reset', $options = array())
 	{
 		$options['type'] = 'reset';
 		return static::button($name, $value, $content, $options);
 	}
 	/**
 	 * Generates an input type of the given type.
 	 * @param string $type the type attribute.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated input tag
 	 */
 	public static function input($type, $name = null, $value = null, $options = array())
 	{
 		$options['type'] = $type;
 		$options['name'] = $name;
 		$options['value'] = $value;
 		return static::tag('input', null, $options);
 	}
 	/**
 	 * Generates an input button.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function buttonInput($name, $value = 'Button', $options = array())
 	{
 		return static::input('button', $name, $value, $options);
 	}
 	/**
 	 * Generates a submit input button.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function submitInput($name = null, $value = 'Submit', $options = array())
 	{
 		return static::input('submit', $name, $value, $options);
 	}
 	/**
 	 * Generates a reset input button.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the attributes of the button tag. The values will be HTML-encoded using [[encode()]].
 	 * Attributes whose value is null will be ignored and not put in the tag returned.
 	 * @return string the generated button tag
 	 */
 	public static function resetInput($name = null, $value = 'Reset', $options = array())
 	{
 		return static::input('reset', $name, $value, $options);
 	}
 	/**
 	 * Generates a text input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function textInput($name, $value = null, $options = array())
 	{
 		return static::input('text', $name, $value, $options);
 	}
 	/**
 	 * Generates a hidden input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function hiddenInput($name, $value = null, $options = array())
 	{
 		return static::input('hidden', $name, $value, $options);
 	}
 	/**
 	 * Generates a password input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function passwordInput($name, $value = null, $options = array())
 	{
 		return static::input('password', $name, $value, $options);
 	}
 	/**
 	 * Generates a file input field.
 	 * To use a file input field, you should set the enclosing form's "enctype" attribute to
 	 * be "multipart/form-data". After the form is submitted, the uploaded file information
 	 * can be obtained via $_FILES[$name] (see PHP documentation).
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function fileInput($name, $value = null, $options = array())
 	{
 		return static::input('file', $name, $value, $options);
 	}
 	/**
 	 * Generates a text area input.
 	 * @param string $name the input name
 	 * @param string $value the input value. Note that it will be encoded using [[encode()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated text area tag
 	 */
 	public static function textarea($name, $value = '', $options = array())
 	{
 		$options['name'] = $name;
 		return static::tag('textarea', static::encode($value), $options);
 	}
 	/**
 	 * Generates a radio button input.
 	 * @param string $name the name attribute.
 	 * @param boolean $checked whether the radio button should be checked.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be rendered.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - uncheck: string, the value associated with the uncheck state of the radio button. When this attribute
 	 *   is present, a hidden input will be generated so that if the radio button is not checked and is submitted,
 	 *   the value of this attribute will still be submitted to the server via the hidden input.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 *
 	 * @return string the generated radio button tag
 	 */
 	public static function radio($name, $checked = false, $value = '1', $options = array())
 	{
 		$options['checked'] = $checked;
 		$options['value'] = $value;
 		if (isset($options['uncheck'])) {
 			// add a hidden field so that if the radio button is not selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['uncheck']);
 			unset($options['uncheck']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . static::input('radio', $name, $value, $options);
 	}
 	/**
 	 * Generates a checkbox input.
 	 * @param string $name the name attribute.
 	 * @param boolean $checked whether the checkbox should be checked.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be rendered.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - uncheck: string, the value associated with the uncheck state of the checkbox. When this attribute
 	 *   is present, a hidden input will be generated so that if the checkbox is not checked and is submitted,
 	 *   the value of this attribute will still be submitted to the server via the hidden input.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 *
 	 * @return string the generated checkbox tag
 	 */
 	public static function checkbox($name, $checked = false, $value = '1', $options = array())
 	{
 		$options['checked'] = $checked;
 		$options['value'] = $value;
 		if (isset($options['uncheck'])) {
 			// add a hidden field so that if the checkbox is not selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['uncheck']);
 			unset($options['uncheck']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . static::input('checkbox', $name, $value, $options);
 	}
 	/**
 	 * Generates a drop-down list.
 	 * @param string $name the input name
 	 * @param string $selection the selected value
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - prompt: string, a prompt text to be displayed as the first option;
 	 * - options: array, the attributes for the select option tags. The array keys must be valid option values,
 	 *   and the array values are the extra attributes for the corresponding option tags. For example,
 	 *
 	 * ~~~
 	 * array(
 	 *     'value1' => array('disabled' => true),
 	 *     'value2' => array('label' => 'value 2'),
 	 * );
 	 * ~~~
 	 *
 	 * - groups: array, the attributes for the optgroup tags. The structure of this is similar to that of 'options',
 	 *   except that the array keys represent the optgroup labels specified in $items.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 * 
 	 * @return string the generated drop-down list tag
 	 */
 	public static function dropDownList($name, $selection = null, $items = array(), $options = array())
 	{
 		$options['name'] = $name;
 		$selectOptions = static::renderSelectOptions($selection, $items, $options);
 		return static::tag('select', "\n" . $selectOptions . "\n", $options);
 	}
 	/**
 	 * Generates a list box.
 	 * @param string $name the input name
 	 * @param string|array $selection the selected value(s)
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - prompt: string, a prompt text to be displayed as the first option;
 	 * - options: array, the attributes for the select option tags. The array keys must be valid option values,
 	 *   and the array values are the extra attributes for the corresponding option tags. For example,
 	 *
 	 * ~~~
 	 * array(
 	 *     'value1' => array('disabled' => true),
 	 *     'value2' => array('label' => 'value 2'),
 	 * );
 	 * ~~~
 	 *
 	 * - groups: array, the attributes for the optgroup tags. The structure of this is similar to that of 'options',
 	 *   except that the array keys represent the optgroup labels specified in $items.
 	 * - unselect: string, the value that will be submitted when no option is selected.
 	 *   When this attribute is set, a hidden field will be generated so that if no option is selected in multiple
 	 *   mode, we can still obtain the posted unselect value.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 * 
 	 * @return string the generated list box tag
 	 */
 	public static function listBox($name, $selection = null, $items = array(), $options = array())
 	{
 		if (!isset($options['size'])) {
 			$options['size'] = 4;
 		}
 		if (isset($options['multiple']) && $options['multiple'] && substr($name, -2) !== '[]') {
 			$name .= '[]';
 		}
 		$options['name'] = $name;
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			if (substr($name, -2) === '[]') {
 				$name = substr($name, 0, -2);
 			}
 			$hidden = static::hiddenInput($name, $options['unselect']);
 			unset($options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		$selectOptions = static::renderSelectOptions($selection, $items, $options);
 		return $hidden . static::tag('select', "\n" . $selectOptions . "\n", $options);
 	}
 	/**
 	 * Generates a list of checkboxes.
 	 * A checkbox list allows multiple selection, like [[listBox()]].
 	 * As a result, the corresponding submitted value is an array.
 	 * @param string $name the name attribute of each checkbox.
 	 * @param string|array $selection the selected value(s).
 	 * @param array $items the data item used to generate the checkboxes.
 	 * The array keys are the labels, while the array values are the corresponding checkbox values.
 	 * Note that the labels will NOT be HTML-encoded, while the values will.
 	 * @param array $options options (name => config) for the checkbox list. The following options are supported:
 	 *
 	 * - unselect: string, the value that should be submitted when none of the checkboxes is selected.
 	 *   By setting this option, a hidden input will be generated.
 	 * - separator: string, the HTML code that separates items.
 	 * - item: callable, a callback that can be used to customize the generation of the HTML code
 	 *   corresponding to a single item in $items. The signature of this callback must be:
 	 *
 	 * ~~~
 	 * function ($index, $label, $name, $checked, $value)
 	 * ~~~
 	 *
 	 * where $index is the zero-based index of the checkbox in the whole list; $label
 	 * is the label for the checkbox; and $name, $value and $checked represent the name,
 	 * value and the checked status of the checkbox input.
 	 * @return string the generated checkbox list
 	 */
 	public static function checkboxList($name, $selection = null, $items = array(), $options = array())
 	{
 		if (substr($name, -2) !== '[]') {
 			$name .= '[]';
 		}
 		$formatter = isset($options['item']) ? $options['item'] : null;
 		$lines = array();
 		$index = 0;
 		foreach ($items as $value => $label) {
 			$checked = $selection !== null &&
 				(!is_array($selection) && !strcmp($value, $selection)
 					|| is_array($selection) && in_array($value, $selection));
 			if ($formatter !== null) {
 				$lines[] = call_user_func($formatter, $index, $label, $name, $checked, $value);
 			} else {
 				$lines[] = static::label(static::checkbox($name, $checked, $value) . ' ' . $label);
 			}
 			$index++;
 		}
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			$name2 = substr($name, -2) === '[]' ? substr($name, 0, -2) : $name;
 			$hidden = static::hiddenInput($name2, $options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		$separator = isset($options['separator']) ? $options['separator'] : "\n";
 		return $hidden . implode($separator, $lines);
 	}
 	/**
 	 * Generates a list of radio buttons.
 	 * A radio button list is like a checkbox list, except that it only allows single selection.
 	 * @param string $name the name attribute of each radio button.
 	 * @param string|array $selection the selected value(s).
 	 * @param array $items the data item used to generate the radio buttons.
 	 * The array keys are the labels, while the array values are the corresponding radio button values.
 	 * Note that the labels will NOT be HTML-encoded, while the values will.
 	 * @param array $options options (name => config) for the radio button list. The following options are supported:
 	 *
 	 * - unselect: string, the value that should be submitted when none of the radio buttons is selected.
 	 *   By setting this option, a hidden input will be generated.
 	 * - separator: string, the HTML code that separates items.
 	 * - item: callable, a callback that can be used to customize the generation of the HTML code
 	 *   corresponding to a single item in $items. The signature of this callback must be:
 	 *
 	 * ~~~
 	 * function ($index, $label, $name, $checked, $value)
 	 * ~~~
 	 *
 	 * where $index is the zero-based index of the radio button in the whole list; $label
 	 * is the label for the radio button; and $name, $value and $checked represent the name,
 	 * value and the checked status of the radio button input.
 	 * @return string the generated radio button list
 	 */
 	public static function radioList($name, $selection = null, $items = array(), $options = array())
 	{
 		$formatter = isset($options['item']) ? $options['item'] : null;
 		$lines = array();
 		$index = 0;
 		foreach ($items as $value => $label) {
 			$checked = $selection !== null &&
 				(!is_array($selection) && !strcmp($value, $selection)
 					|| is_array($selection) && in_array($value, $selection));
 			if ($formatter !== null) {
 				$lines[] = call_user_func($formatter, $index, $label, $name, $checked, $value);
 			} else {
 				$lines[] = static::label(static::radio($name, $checked, $value) . ' ' . $label);
 			}
 			$index++;
 		}
 		$separator = isset($options['separator']) ? $options['separator'] : "\n";
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . implode($separator, $lines);
 	}
 	/**
 	 * Renders the option tags that can be used by [[dropDownList()]] and [[listBox()]].
 	 * @param string|array $selection the selected value(s). This can be either a string for single selection
 	 * or an array for multiple selections.
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $tagOptions the $options parameter that is passed to the [[dropDownList()]] or [[listBox()]] call.
 	 * This method will take out these elements, if any: "prompt", "options" and "groups". See more details
 	 * in [[dropDownList()]] for the explanation of these elements.
 	 *
 	 * @return string the generated list options
 	 */
 	public static function renderSelectOptions($selection, $items, &$tagOptions = array())
 	{
 		$lines = array();
 		if (isset($tagOptions['prompt'])) {
 			$prompt = str_replace(' ', '&nbsp;', static::encode($tagOptions['prompt']));
 			$lines[] = static::tag('option', $prompt, array('value' => ''));
 		}
 		$options = isset($tagOptions['options']) ? $tagOptions['options'] : array();
 		$groups = isset($tagOptions['groups']) ? $tagOptions['groups'] : array();
 		unset($tagOptions['prompt'], $tagOptions['options'], $tagOptions['groups']);
 		foreach ($items as $key => $value) {
 			if (is_array($value)) {
 				$groupAttrs = isset($groups[$key]) ? $groups[$key] : array();
 				$groupAttrs['label'] = $key;
 				$attrs = array('options' => $options, 'groups' => $groups);
 				$content = static::renderSelectOptions($selection, $value, $attrs);
 				$lines[] = static::tag('optgroup', "\n" . $content . "\n", $groupAttrs);
 			} else {
 				$attrs = isset($options[$key]) ? $options[$key] : array();
 				$attrs['value'] = $key;
 				$attrs['selected'] = $selection !== null &&
 					(!is_array($selection) && !strcmp($key, $selection)
 						|| is_array($selection) && in_array($key, $selection));
 				$lines[] = static::tag('option', str_replace(' ', '&nbsp;', static::encode($value)), $attrs);
 			}
 		}
 		return implode("\n", $lines);
 	}
 	/**
 	 * Renders the HTML tag attributes.
 	 * Boolean attributes such as s 'checked', 'disabled', 'readonly', will be handled specially
 	 * according to [[booleanAttributes]] and [[showBooleanAttributeValues]].
 	 * @param array $attributes attributes to be rendered. The attribute values will be HTML-encoded using [[encode()]].
 	 * Attributes whose value is null will be ignored and not put in the rendering result.
 	 * @return string the rendering result. If the attributes are not empty, they will be rendered
 	 * into a string with a leading white space (such that it can be directly appended to the tag name
 	 * in a tag. If there is no attribute, an empty string will be returned.
 	 */
 	public static function renderTagAttributes($attributes)
 	{
 		if (count($attributes) > 1) {
 			$sorted = array();
 			foreach (static::$attributeOrder as $name) {
 				if (isset($attributes[$name])) {
 					$sorted[$name] = $attributes[$name];
 				}
 			}
 			$attributes = array_merge($sorted, $attributes);
 		}
 		$html = '';
 		foreach ($attributes as $name => $value) {
 			if (isset(static::$booleanAttributes[strtolower($name)])) {
 				if ($value || strcasecmp($name, $value) === 0) {
 					$html .= static::$showBooleanAttributeValues ? " $name=\"$name\"" : " $name";
 				}
 			} elseif ($value !== null) {
 				$html .= " $name=\"" . static::encode($value) . '"';
 			}
 		}
 		return $html;
 	}
 	/**
 	 * Normalizes the input parameter to be a valid URL.
 	 *
 	 * If the input parameter
 	 *
 	 * - is an empty string: the currently requested URL will be returned;
 	 * - is a non-empty string: it will be processed by [[Yii::getAlias()]] and returned;
 	 * - is an array: the first array element is considered a route, while the rest of the name-value
 	 *   pairs are treated as the parameters to be used for URL creation using [[\yii\web\Controller::createUrl()]].
 	 *   For example: `array('post/index', 'page' => 2)`, `array('index')`.
 	 *
 	 * @param array|string $url the parameter to be used to generate a valid URL
 	 * @return string the normalized URL
 	 * @throws InvalidParamException if the parameter is invalid.
 	 */
 	public static function url($url)
 	{
 		if (is_array($url)) {
 			if (isset($url[0])) {
 				$route = $url[0];
 				$params = array_splice($url, 1);
 				if (Yii::$app->controller !== null) {
 					return Yii::$app->controller->createUrl($route, $params);
 				} else {
 					return Yii::$app->getUrlManager()->createUrl($route, $params);
 				}
 			} else {
 				throw new InvalidParamException('The array specifying a URL must contain at least one element.');
 			}
 		} elseif ($url === '') {
 			return Yii::$app->getRequest()->getUrl();
 		} else {
 			return Yii::getAlias($url);
 		}
 	}
 }
--- a/framework/helpers/SecurityHelper.php
+++ b/framework/helpers/SecurityHelper.php
@ -7,11 +7,6 @@
 namespace yii\helpers;
 use Yii;
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
 use yii\base\InvalidParamException;
 /**
 * SecurityHelper provides a set of methods to handle common security-related tasks.
 *
@ -29,244 +24,6 @@ use yii\base\InvalidParamException;
 * @author Tom Worster <fsb@thefsb.org>
 * @since 2.0
 */
-class SecurityHelper
+class SecurityHelper extends base\SecurityHelper
 {
 	/**
 	 * Encrypts data.
 	 * @param string $data data to be encrypted.
 	 * @param string $key the encryption secret key
 	 * @return string the encrypted data
 	 * @throws Exception if PHP Mcrypt extension is not loaded or failed to be initialized
 	 * @see decrypt()
 	 */
 	public static function encrypt($data, $key)
 	{
 		$module = static::openCryptModule();
 		$key = StringHelper::substr($key, 0, mcrypt_enc_get_key_size($module));
 		srand();
 		$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($module), MCRYPT_RAND);
 		mcrypt_generic_init($module, $key, $iv);
 		$encrypted = $iv . mcrypt_generic($module, $data);
 		mcrypt_generic_deinit($module);
 		mcrypt_module_close($module);
 		return $encrypted;
 	}
 	/**
 	 * Decrypts data
 	 * @param string $data data to be decrypted.
 	 * @param string $key the decryption secret key
 	 * @return string the decrypted data
 	 * @throws Exception if PHP Mcrypt extension is not loaded or failed to be initialized
 	 * @see encrypt()
 	 */
 	public static function decrypt($data, $key)
 	{
 		$module = static::openCryptModule();
 		$key = StringHelper::substr($key, 0, mcrypt_enc_get_key_size($module));
 		$ivSize = mcrypt_enc_get_iv_size($module);
 		$iv = StringHelper::substr($data, 0, $ivSize);
 		mcrypt_generic_init($module, $key, $iv);
 		$decrypted = mdecrypt_generic($module, StringHelper::substr($data, $ivSize, StringHelper::strlen($data)));
 		mcrypt_generic_deinit($module);
 		mcrypt_module_close($module);
 		return rtrim($decrypted, "\0");
 	}
 	/**
 	 * Prefixes data with a keyed hash value so that it can later be detected if it is tampered.
 	 * @param string $data the data to be protected
 	 * @param string $key the secret key to be used for generating hash
 	 * @param string $algorithm the hashing algorithm (e.g. "md5", "sha1", "sha256", etc.). Call PHP "hash_algos()"
 	 * function to see the supported hashing algorithms on your system.
 	 * @return string the data prefixed with the keyed hash
 	 * @see validateData()
 	 * @see getSecretKey()
 	 */
 	public static function hashData($data, $key, $algorithm = 'sha256')
 	{
 		return hash_hmac($algorithm, $data, $key) . $data;
 	}
 	/**
 	 * Validates if the given data is tampered.
 	 * @param string $data the data to be validated. The data must be previously
 	 * generated by [[hashData()]].
 	 * @param string $key the secret key that was previously used to generate the hash for the data in [[hashData()]].
 	 * @param string $algorithm the hashing algorithm (e.g. "md5", "sha1", "sha256", etc.). Call PHP "hash_algos()"
 	 * function to see the supported hashing algorithms on your system. This must be the same
 	 * as the value passed to [[hashData()]] when generating the hash for the data.
 	 * @return string the real data with the hash stripped off. False if the data is tampered.
 	 * @see hashData()
 	 */
 	public static function validateData($data, $key, $algorithm = 'sha256')
 	{
 		$hashSize = StringHelper::strlen(hash_hmac($algorithm, 'test', $key));
 		$n = StringHelper::strlen($data);
 		if ($n >= $hashSize) {
 			$hash = StringHelper::substr($data, 0, $hashSize);
 			$data2 = StringHelper::substr($data, $hashSize, $n - $hashSize);
 			return $hash === hash_hmac($algorithm, $data2, $key) ? $data2 : false;
 		} else {
 			return false;
 		}
 	}
 	/**
 	 * Returns a secret key associated with the specified name.
 	 * If the secret key does not exist, a random key will be generated
 	 * and saved in the file "keys.php" under the application's runtime directory
 	 * so that the same secret key can be returned in future requests.
 	 * @param string $name the name that is associated with the secret key
 	 * @param integer $length the length of the key that should be generated if not exists
 	 * @return string the secret key associated with the specified name
 	 */
 	public static function getSecretKey($name, $length = 32)
 	{
 		static $keys;
 		$keyFile = Yii::$app->getRuntimePath() . '/keys.php';
 		if ($keys === null) {
 			$keys = is_file($keyFile) ? require($keyFile) : array();
 		}
 		if (!isset($keys[$name])) {
 			// generate a 32-char random key
 			$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
 			$keys[$name] = substr(str_shuffle(str_repeat($chars, 5)), 0, $length);
 			file_put_contents($keyFile, "<?php\nreturn " . var_export($keys, true) . ";\n");
 		}
 		return $keys[$name];
 	}
 	/**
 	 * Opens the mcrypt module.
 	 * @return resource the mcrypt module handle.
 	 * @throws InvalidConfigException if mcrypt extension is not installed
 	 * @throws Exception if mcrypt initialization fails
 	 */
 	protected static function openCryptModule()
 	{
 		if (!extension_loaded('mcrypt')) {
 			throw new InvalidConfigException('The mcrypt PHP extension is not installed.');
 		}
 		$module = @mcrypt_module_open('rijndael-256', '', MCRYPT_MODE_CBC, '');
 		if ($module === false) {
 			throw new Exception('Failed to initialize the mcrypt module.');
 		}
 		return $module;
 	}
 	/**
 	 * Generates a secure hash from a password and a random salt.
 	 *
 	 * The generated hash can be stored in database (e.g. `CHAR(64) CHARACTER SET latin1` on MySQL).
 	 * Later when a password needs to be validated, the hash can be fetched and passed
 	 * to [[validatePassword()]]. For example,
 	 *
 	 * ~~~
 	 * // generates the hash (usually done during user registration or when the password is changed)
 	 * $hash = SecurityHelper::hashPassword($password);
 	 * // ...save $hash in database...
 	 *
 	 * // during login, validate if the password entered is correct using $hash fetched from database
 	 * if (PasswordHelper::verifyPassword($password, $hash) {
 	 *     // password is good
 	 * } else {
 	 *     // password is bad
 	 * }
 	 * ~~~
 	 *
 	 * @param string $password The password to be hashed.
 	 * @param integer $cost Cost parameter used by the Blowfish hash algorithm.
 	 * The higher the value of cost,
 	 * the longer it takes to generate the hash and to verify a password against it. Higher cost
 	 * therefore slows down a brute-force attack. For best protection against brute for attacks,
 	 * set it to the highest value that is tolerable on production servers. The time taken to
 	 * compute the hash doubles for every increment by one of $cost. So, for example, if the
 	 * hash takes 1 second to compute when $cost is 14 then then the compute time varies as
 	 * 2^($cost - 14) seconds.
 	 * @throws Exception on bad password parameter or cost parameter
 	 * @return string The password hash string, ASCII and not longer than 64 characters.
 	 * @see validatePassword()
 	 */
 	public static function generatePasswordHash($password, $cost = 13)
 	{
 		$salt = static::generateSalt($cost);
 		$hash = crypt($password, $salt);
 		if (!is_string($hash) || strlen($hash) < 32) {
 			throw new Exception('Unknown error occurred while generating hash.');
 		}
 		return $hash;
 	}
 	/**
 	 * Verifies a password against a hash.
 	 * @param string $password The password to verify.
 	 * @param string $hash The hash to verify the password against.
 	 * @return boolean whether the password is correct.
 	 * @throws InvalidParamException on bad password or hash parameters or if crypt() with Blowfish hash is not available.
 	 * @see generatePasswordHash()
 	 */
 	public static function validatePassword($password, $hash)
 	{
 		if (!is_string($password) || $password === '') {
 			throw new InvalidParamException('Password must be a string and cannot be empty.');
 		}
 		if (!preg_match('/^\$2[axy]\$(\d\d)\$[\./0-9A-Za-z]{22}/', $hash, $matches) || $matches[1] < 4 || $matches[1] > 30) {
 			throw new InvalidParamException('Hash is invalid.');
 		}
 		$test = crypt($password, $hash);
 		$n = strlen($test);
 		if (strlen($test) < 32 || $n !== strlen($hash)) {
 			return false;
 		}
 		// Use a for-loop to compare two strings to prevent timing attacks. See:
 		// http://codereview.stackexchange.com/questions/13512
 		$check = 0;
 		for ($i = 0; $i < $n; ++$i) {
 			$check |= (ord($test[$i]) ^ ord($hash[$i]));
 		}
 		return $check === 0;
 	}
 	/**
 	 * Generates a salt that can be used to generate a password hash.
 	 *
 	 * The PHP [crypt()](http://php.net/manual/en/function.crypt.php) built-in function
 	 * requires, for the Blowfish hash algorithm, a salt string in a specific format:
 	 * "$2a$", "$2x$" or "$2y$", a two digit cost parameter, "$", and 22 characters
 	 * from the alphabet "./0-9A-Za-z".
 	 *
 	 * @param integer $cost the cost parameter
 	 * @return string the random salt value.
 	 * @throws InvalidParamException if the cost parameter is not between 4 and 30
 	 */
 	protected static function generateSalt($cost = 13)
 	{
 		$cost = (int)$cost;
 		if ($cost < 4 || $cost > 30) {
 			throw new InvalidParamException('Cost must be between 4 and 31.');
 		}
 		// Get 20 * 8bits of pseudo-random entropy from mt_rand().
 		$rand = '';
 		for ($i = 0; $i < 20; ++$i) {
 			$rand .= chr(mt_rand(0, 255));
 		}
 		// Add the microtime for a little more entropy.
 		$rand .= microtime();
 		// Mix the bits cryptographically into a 20-byte binary string.
 		$rand = sha1($rand, true);
 		// Form the prefix that specifies Blowfish algorithm and cost parameter.
 		$salt = sprintf("$2y$%02d$", $cost);
 		// Append the random salt data in the required base64 format.
 		$salt .= str_replace('+', '.', substr(base64_encode($rand), 0, 22));
 		return $salt;
 	}
 }
--- a/framework/helpers/StringHelper.php
+++ b/framework/helpers/StringHelper.php
@ -14,112 +14,6 @@ namespace yii\helpers;
 * @author Alex Makarov <sam@rmcreative.ru>
 * @since 2.0
 */
-class StringHelper
+class StringHelper extends base\StringHelper
 {
 	/**
 	 * Returns the number of bytes in the given string.
 	 * This method ensures the string is treated as a byte array.
 	 * It will use `mb_strlen()` if it is available.
 	 * @param string $string the string being measured for length
 	 * @return integer the number of bytes in the given string.
 	 */
 	public static function strlen($string)
 	{
 		return function_exists('mb_strlen') ? mb_strlen($string, '8bit') : strlen($string);
 	}
 	/**
 	 * Returns the portion of string specified by the start and length parameters.
 	 * This method ensures the string is treated as a byte array.
 	 * It will use `mb_substr()` if it is available.
 	 * @param string $string the input string. Must be one character or longer.
 	 * @param integer $start the starting position
 	 * @param integer $length the desired portion length
 	 * @return string the extracted part of string, or FALSE on failure or an empty string.
 	 * @see http://www.php.net/manual/en/function.substr.php
 	 */
 	public static function substr($string, $start, $length)
 	{
 		return function_exists('mb_substr') ? mb_substr($string, $start, $length, '8bit') : substr($string, $start, $length);
 	}
 	/**
 	 * Converts a word to its plural form.
 	 * Note that this is for English only!
 	 * For example, 'apple' will become 'apples', and 'child' will become 'children'.
 	 * @param string $name the word to be pluralized
 	 * @return string the pluralized word
 	 */
 	public static function pluralize($name)
 	{
 		static $rules = array(
 			'/(m)ove$/i' => '\1oves',
 			'/(f)oot$/i' => '\1eet',
 			'/(c)hild$/i' => '\1hildren',
 			'/(h)uman$/i' => '\1umans',
 			'/(m)an$/i' => '\1en',
 			'/(s)taff$/i' => '\1taff',
 			'/(t)ooth$/i' => '\1eeth',
 			'/(p)erson$/i' => '\1eople',
 			'/([m|l])ouse$/i' => '\1ice',
 			'/(x|ch|ss|sh|us|as|is|os)$/i' => '\1es',
 			'/([^aeiouy]|qu)y$/i' => '\1ies',
 			'/(?:([^f])fe|([lr])f)$/i' => '\1\2ves',
 			'/(shea|lea|loa|thie)f$/i' => '\1ves',
 			'/([ti])um$/i' => '\1a',
 			'/(tomat|potat|ech|her|vet)o$/i' => '\1oes',
 			'/(bu)s$/i' => '\1ses',
 			'/(ax|test)is$/i' => '\1es',
 			'/s$/' => 's',
 		);
 		foreach ($rules as $rule => $replacement) {
 			if (preg_match($rule, $name)) {
 				return preg_replace($rule, $replacement, $name);
 			}
 		}
 		return $name . 's';
 	}
 	/**
 	 * Converts a CamelCase name into space-separated words.
 	 * For example, 'PostTag' will be converted to 'Post Tag'.
 	 * @param string $name the string to be converted
 	 * @param boolean $ucwords whether to capitalize the first letter in each word
 	 * @return string the resulting words
 	 */
 	public static function camel2words($name, $ucwords = true)
 	{
 		$label = trim(strtolower(str_replace(array('-', '_', '.'), ' ', preg_replace('/(?<![A-Z])[A-Z]/', ' \0', $name))));
 		return $ucwords ? ucwords($label) : $label;
 	}
 	/**
 	 * Converts a CamelCase name into an ID in lowercase.
 	 * Words in the ID may be concatenated using the specified character (defaults to '-').
 	 * For example, 'PostTag' will be converted to 'post-tag'.
 	 * @param string $name the string to be converted
 	 * @param string $separator the character used to concatenate the words in the ID
 	 * @return string the resulting ID
 	 */
 	public static function camel2id($name, $separator = '-')
 	{
 		if ($separator === '_') {
 			return trim(strtolower(preg_replace('/(?<![A-Z])[A-Z]/', '_\0', $name)), '_');
 		} else {
 			return trim(strtolower(str_replace('_', $separator, preg_replace('/(?<![A-Z])[A-Z]/', $separator . '\0', $name))), $separator);
 		}
 	}
 	/**
 	 * Converts an ID into a CamelCase name.
 	 * Words in the ID separated by `$separator` (defaults to '-') will be concatenated into a CamelCase name.
 	 * For example, 'post-tag' is converted to 'PostTag'.
 	 * @param string $id the ID to be converted
 	 * @param string $separator the character used to separate the words in the ID
 	 * @return string the resulting CamelCase name
 	 */
 	public static function id2camel($id, $separator = '-')
 	{
 		return str_replace(' ', '', ucwords(implode(' ', explode($separator, $id))));
 	}
 }
--- a/framework/helpers/VarDumper.php
+++ b/framework/helpers/VarDumper.php
@ -23,112 +23,6 @@ namespace yii\helpers;
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
-class CVarDumper
+class VarDumper extends base\VarDumper
 {
 	private static $_objects;
 	private static $_output;
 	private static $_depth;
 	/**
 	 * Displays a variable.
 	 * This method achieves the similar functionality as var_dump and print_r
 	 * but is more robust when handling complex objects such as Yii controllers.
 	 * @param mixed $var variable to be dumped
 	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
 	 * @param boolean $highlight whether the result should be syntax-highlighted
 	 */
 	public static function dump($var, $depth = 10, $highlight = false)
 	{
 		echo self::dumpAsString($var, $depth, $highlight);
 	}
 	/**
 	 * Dumps a variable in terms of a string.
 	 * This method achieves the similar functionality as var_dump and print_r
 	 * but is more robust when handling complex objects such as Yii controllers.
 	 * @param mixed $var variable to be dumped
 	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
 	 * @param boolean $highlight whether the result should be syntax-highlighted
 	 * @return string the string representation of the variable
 	 */
 	public static function dumpAsString($var, $depth = 10, $highlight = false)
 	{
 		self::$_output = '';
 		self::$_objects = array();
 		self::$_depth = $depth;
 		self::dumpInternal($var, 0);
 		if ($highlight) {
 			$result = highlight_string("<?php\n" . self::$_output, true);
 			self::$_output = preg_replace('/&lt;\\?php<br \\/>/', '', $result, 1);
 		}
 		return self::$_output;
 	}
 	/*
 	 * @param mixed $var variable to be dumped
 	 * @param integer $level depth level
 	 */
 	private static function dumpInternal($var, $level)
 	{
 		switch (gettype($var)) {
 			case 'boolean':
 				self::$_output .= $var ? 'true' : 'false';
 				break;
 			case 'integer':
 				self::$_output .= "$var";
 				break;
 			case 'double':
 				self::$_output .= "$var";
 				break;
 			case 'string':
 				self::$_output .= "'" . addslashes($var) . "'";
 				break;
 			case 'resource':
 				self::$_output .= '{resource}';
 				break;
 			case 'NULL':
 				self::$_output .= "null";
 				break;
 			case 'unknown type':
 				self::$_output .= '{unknown}';
 				break;
 			case 'array':
 				if (self::$_depth <= $level) {
 					self::$_output .= 'array(...)';
 				} elseif (empty($var)) {
 					self::$_output .= 'array()';
 				} else {
 					$keys = array_keys($var);
 					$spaces = str_repeat(' ', $level * 4);
 					self::$_output .= "array\n" . $spaces . '(';
 					foreach ($keys as $key) {
 						self::$_output .= "\n" . $spaces . '    ';
 						self::dumpInternal($key, 0);
 						self::$_output .= ' => ';
 						self::dumpInternal($var[$key], $level + 1);
 					}
 					self::$_output .= "\n" . $spaces . ')';
 				}
 				break;
 			case 'object':
 				if (($id = array_search($var, self::$_objects, true)) !== false) {
 					self::$_output .= get_class($var) . '#' . ($id + 1) . '(...)';
 				} elseif (self::$_depth <= $level) {
 					self::$_output .= get_class($var) . '(...)';
 				} else {
 					$id = self::$_objects[] = $var;
 					$className = get_class($var);
 					$members = (array)$var;
 					$spaces = str_repeat(' ', $level * 4);
 					self::$_output .= "$className#$id\n" . $spaces . '(';
 					foreach ($members as $key => $value) {
 						$keyDisplay = strtr(trim($key), array("\0" => ':'));
 						self::$_output .= "\n" . $spaces . "    [$keyDisplay] => ";
 						self::dumpInternal($value, $level + 1);
 					}
 					self::$_output .= "\n" . $spaces . ')';
 				}
 				break;
 		}
 	}
 }
--- a/framework/helpers/base/ArrayHelper.php
+++ b/framework/helpers/base/ArrayHelper.php
@ -0,0 +1,340 @@
 <?php
 /**
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @link http://www.yiiframework.com/
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 use Yii;
 use yii\base\InvalidParamException;
 /**
 * ArrayHelper provides additional array functionality you can use in your
 * application.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class ArrayHelper
 {
 	/**
 	 * Merges two or more arrays into one recursively.
 	 * If each array has an element with the same string key value, the latter
 	 * will overwrite the former (different from array_merge_recursive).
 	 * Recursive merging will be conducted if both arrays have an element of array
 	 * type and are having the same key.
 	 * For integer-keyed elements, the elements from the latter array will
 	 * be appended to the former array.
 	 * @param array $a array to be merged to
 	 * @param array $b array to be merged from. You can specify additional
 	 * arrays via third argument, fourth argument etc.
 	 * @return array the merged array (the original arrays are not changed.)
 	 */
 	public static function merge($a, $b)
 	{
 		$args = func_get_args();
 		$res = array_shift($args);
 		while ($args !== array()) {
 			$next = array_shift($args);
 			foreach ($next as $k => $v) {
 				if (is_integer($k)) {
 					isset($res[$k]) ? $res[] = $v : $res[$k] = $v;
 				} elseif (is_array($v) && isset($res[$k]) && is_array($res[$k])) {
 					$res[$k] = self::merge($res[$k], $v);
 				} else {
 					$res[$k] = $v;
 				}
 			}
 		}
 		return $res;
 	}
 	/**
 	 * Retrieves the value of an array element or object property with the given key or property name.
 	 * If the key does not exist in the array, the default value will be returned instead.
 	 *
 	 * Below are some usage examples,
 	 *
 	 * ~~~
 	 * // working with array
 	 * $username = \yii\helpers\ArrayHelper::getValue($_POST, 'username');
 	 * // working with object
 	 * $username = \yii\helpers\ArrayHelper::getValue($user, 'username');
 	 * // working with anonymous function
 	 * $fullName = \yii\helpers\ArrayHelper::getValue($user, function($user, $defaultValue) {
 	 *     return $user->firstName . ' ' . $user->lastName;
 	 * });
 	 * ~~~
 	 *
 	 * @param array|object $array array or object to extract value from
 	 * @param string|\Closure $key key name of the array element, or property name of the object,
 	 * or an anonymous function returning the value. The anonymous function signature should be:
 	 * `function($array, $defaultValue)`.
 	 * @param mixed $default the default value to be returned if the specified key does not exist
 	 * @return mixed the value of the
 	 */
 	public static function getValue($array, $key, $default = null)
 	{
 		if ($key instanceof \Closure) {
 			return $key($array, $default);
 		} elseif (is_array($array)) {
 			return isset($array[$key]) || array_key_exists($key, $array) ? $array[$key] : $default;
 		} else {
 			return $array->$key;
 		}
 	}
 	/**
 	 * Indexes an array according to a specified key.
 	 * The input array should be multidimensional or an array of objects.
 	 *
 	 * The key can be a key name of the sub-array, a property name of object, or an anonymous
 	 * function which returns the key value given an array element.
 	 *
 	 * If a key value is null, the corresponding array element will be discarded and not put in the result.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'data' => 'abc'),
 	 *     array('id' => '345', 'data' => 'def'),
 	 * );
 	 * $result = ArrayHelper::index($array, 'id');
 	 * // the result is:
 	 * // array(
 	 * //     '123' => array('id' => '123', 'data' => 'abc'),
 	 * //     '345' => array('id' => '345', 'data' => 'def'),
 	 * // )
 	 *
 	 * // using anonymous function
 	 * $result = ArrayHelper::index($array, function(element) {
 	 *     return $element['id'];
 	 * });
 	 * ~~~
 	 *
 	 * @param array $array the array that needs to be indexed
 	 * @param string|\Closure $key the column name or anonymous function whose result will be used to index the array
 	 * @return array the indexed array
 	 */
 	public static function index($array, $key)
 	{
 		$result = array();
 		foreach ($array as $element) {
 			$value = static::getValue($element, $key);
 			$result[$value] = $element;
 		}
 		return $result;
 	}
 	/**
 	 * Returns the values of a specified column in an array.
 	 * The input array should be multidimensional or an array of objects.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'data' => 'abc'),
 	 *     array('id' => '345', 'data' => 'def'),
 	 * );
 	 * $result = ArrayHelper::getColumn($array, 'id');
 	 * // the result is: array( '123', '345')
 	 *
 	 * // using anonymous function
 	 * $result = ArrayHelper::getColumn($array, function(element) {
 	 *     return $element['id'];
 	 * });
 	 * ~~~
 	 *
 	 * @param array $array
 	 * @param string|\Closure $name
 	 * @param boolean $keepKeys whether to maintain the array keys. If false, the resulting array
 	 * will be re-indexed with integers.
 	 * @return array the list of column values
 	 */
 	public static function getColumn($array, $name, $keepKeys = true)
 	{
 		$result = array();
 		if ($keepKeys) {
 			foreach ($array as $k => $element) {
 				$result[$k] = static::getValue($element, $name);
 			}
 		} else {
 			foreach ($array as $element) {
 				$result[] = static::getValue($element, $name);
 			}
 		}
 		return $result;
 	}
 	/**
 	 * Builds a map (key-value pairs) from a multidimensional array or an array of objects.
 	 * The `$from` and `$to` parameters specify the key names or property names to set up the map.
 	 * Optionally, one can further group the map according to a grouping field `$group`.
 	 *
 	 * For example,
 	 *
 	 * ~~~
 	 * $array = array(
 	 *     array('id' => '123', 'name' => 'aaa', 'class' => 'x'),
 	 *     array('id' => '124', 'name' => 'bbb', 'class' => 'x'),
 	 *     array('id' => '345', 'name' => 'ccc', 'class' => 'y'),
 	 * );
 	 *
 	 * $result = ArrayHelper::map($array, 'id', 'name');
 	 * // the result is:
 	 * // array(
 	 * //     '123' => 'aaa',
 	 * //     '124' => 'bbb',
 	 * //     '345' => 'ccc',
 	 * // )
 	 *
 	 * $result = ArrayHelper::map($array, 'id', 'name', 'class');
 	 * // the result is:
 	 * // array(
 	 * //     'x' => array(
 	 * //         '123' => 'aaa',
 	 * //         '124' => 'bbb',
 	 * //     ),
 	 * //     'y' => array(
 	 * //         '345' => 'ccc',
 	 * //     ),
 	 * // )
 	 * ~~~
 	 *
 	 * @param array $array
 	 * @param string|\Closure $from
 	 * @param string|\Closure $to
 	 * @param string|\Closure $group
 	 * @return array
 	 */
 	public static function map($array, $from, $to, $group = null)
 	{
 		$result = array();
 		foreach ($array as $element) {
 			$key = static::getValue($element, $from);
 			$value = static::getValue($element, $to);
 			if ($group !== null) {
 				$result[static::getValue($element, $group)][$key] = $value;
 			} else {
 				$result[$key] = $value;
 			}
 		}
 		return $result;
 	}
 	/**
 	 * Sorts an array of objects or arrays (with the same structure) by one or several keys.
 	 * @param array $array the array to be sorted. The array will be modified after calling this method.
 	 * @param string|\Closure|array $key the key(s) to be sorted by. This refers to a key name of the sub-array
 	 * elements, a property name of the objects, or an anonymous function returning the values for comparison
 	 * purpose. The anonymous function signature should be: `function($item)`.
 	 * To sort by multiple keys, provide an array of keys here.
 	 * @param boolean|array $ascending whether to sort in ascending or descending order. When
 	 * sorting by multiple keys with different ascending orders, use an array of ascending flags.
 	 * @param integer|array $sortFlag the PHP sort flag. Valid values include:
 	 * `SORT_REGULAR`, `SORT_NUMERIC`, `SORT_STRING`, and `SORT_STRING | SORT_FLAG_CASE`. The last
 	 * value is for sorting strings in case-insensitive manner. Please refer to
 	 * See [PHP manual](http://php.net/manual/en/function.sort.php) for more details.
 	 * When sorting by multiple keys with different sort flags, use an array of sort flags.
 	 * @throws InvalidParamException if the $ascending or $sortFlag parameters do not have
 	 * correct number of elements as that of $key.
 	 */
 	public static function multisort(&$array, $key, $ascending = true, $sortFlag = SORT_REGULAR)
 	{
 		$keys = is_array($key) ? $key : array($key);
 		if (empty($keys) || empty($array)) {
 			return;
 		}
 		$n = count($keys);
 		if (is_scalar($ascending)) {
 			$ascending = array_fill(0, $n, $ascending);
 		} elseif (count($ascending) !== $n) {
 			throw new InvalidParamException('The length of $ascending parameter must be the same as that of $keys.');
 		}
 		if (is_scalar($sortFlag)) {
 			$sortFlag = array_fill(0, $n, $sortFlag);
 		} elseif (count($sortFlag) !== $n) {
 			throw new InvalidParamException('The length of $ascending parameter must be the same as that of $keys.');
 		}
 		$args = array();
 		foreach ($keys as $i => $key) {
 			$flag = $sortFlag[$i];
 			if ($flag == (SORT_STRING | SORT_FLAG_CASE)) {
 				$flag = SORT_STRING;
 				$column = array();
 				foreach (static::getColumn($array, $key) as $k => $value) {
 					$column[$k] = strtolower($value);
 				}
 				$args[] = $column;
 			} else {
 				$args[] = static::getColumn($array, $key);
 			}
 			$args[] = $ascending[$i] ? SORT_ASC : SORT_DESC;
 			$args[] = $flag;
 		}
 		$args[] = &$array;
 		call_user_func_array('array_multisort', $args);
 	}
 	/**
 	 * Encodes special characters in an array of strings into HTML entities.
 	 * Both the array keys and values will be encoded.
 	 * If a value is an array, this method will also encode it recursively.
 	 * @param array $data data to be encoded
 	 * @param boolean $valuesOnly whether to encode array values only. If false,
 	 * both the array keys and array values will be encoded.
 	 * @param string $charset the charset that the data is using. If not set,
 	 * [[\yii\base\Application::charset]] will be used.
 	 * @return array the encoded data
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars.php
 	 */
 	public static function htmlEncode($data, $valuesOnly = true, $charset = null)
 	{
 		if ($charset === null) {
 			$charset = Yii::$app->charset;
 		}
 		$d = array();
 		foreach ($data as $key => $value) {
 			if (!$valuesOnly && is_string($key)) {
 				$key = htmlspecialchars($key, ENT_QUOTES, $charset);
 			}
 			if (is_string($value)) {
 				$d[$key] = htmlspecialchars($value, ENT_QUOTES, $charset);
 			} elseif (is_array($value)) {
 				$d[$key] = static::htmlEncode($value, $charset);
 			}
 		}
 		return $d;
 	}
 	/**
 	 * Decodes HTML entities into the corresponding characters in an array of strings.
 	 * Both the array keys and values will be decoded.
 	 * If a value is an array, this method will also decode it recursively.
 	 * @param array $data data to be decoded
 	 * @param boolean $valuesOnly whether to decode array values only. If false,
 	 * both the array keys and array values will be decoded.
 	 * @return array the decoded data
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars-decode.php
 	 */
 	public static function htmlDecode($data, $valuesOnly = true)
 	{
 		$d = array();
 		foreach ($data as $key => $value) {
 			if (!$valuesOnly && is_string($key)) {
 				$key = htmlspecialchars_decode($key, ENT_QUOTES);
 			}
 			if (is_string($value)) {
 				$d[$key] = htmlspecialchars_decode($value, ENT_QUOTES);
 			} elseif (is_array($value)) {
 				$d[$key] = static::htmlDecode($value);
 			}
 		}
 		return $d;
 	}
 }
--- a/framework/helpers/base/ConsoleColor.php
+++ b/framework/helpers/base/ConsoleColor.php
@ -0,0 +1,470 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 // todo test this on all kinds of terminals, especially windows (check out lib ncurses)
 /**
 * Console View is the base class for console view components
 *
 * A console view provides functionality to create rich console application by allowing to format output
 * by adding color and font style to it.
 *
 * @author Carsten Brandt <mail@cebe.cc>
 * @since 2.0
 */
 class ConsoleColor
 {
 	const FG_BLACK = 30;
 	const FG_RED = 31;
 	const FG_GREEN = 32;
 	const FG_YELLOW = 33;
 	const FG_BLUE = 34;
 	const FG_PURPLE = 35;
 	const FG_CYAN = 36;
 	const FG_GREY = 37;
 	const BG_BLACK = 40;
 	const BG_RED = 41;
 	const BG_GREEN = 42;
 	const BG_YELLOW = 43;
 	const BG_BLUE = 44;
 	const BG_PURPLE = 45;
 	const BG_CYAN = 46;
 	const BG_GREY = 47;
 	const BOLD = 1;
 	const ITALIC = 3;
 	const UNDERLINE = 4;
 	const BLINK = 5;
 	const NEGATIVE = 7;
 	const CONCEALED = 8;
 	const CROSSED_OUT = 9;
 	const FRAMED = 51;
 	const ENCIRCLED = 52;
 	const OVERLINED = 53;
 	/**
 	 * Moves the terminal cursor up by sending ANSI control code CUU to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $rows number of rows the cursor should be moved up
 	 */
 	public static function moveCursorUp($rows=1)
 	{
 		echo "\033[" . (int) $rows . 'A';
 	}
 	/**
 	 * Moves the terminal cursor down by sending ANSI control code CUD to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $rows number of rows the cursor should be moved down
 	 */
 	public static function moveCursorDown($rows=1)
 	{
 		echo "\033[" . (int) $rows . 'B';
 	}
 	/**
 	 * Moves the terminal cursor forward by sending ANSI control code CUF to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $steps number of steps the cursor should be moved forward
 	 */
 	public static function moveCursorForward($steps=1)
 	{
 		echo "\033[" . (int) $steps . 'C';
 	}
 	/**
 	 * Moves the terminal cursor backward by sending ANSI control code CUB to the terminal.
 	 * If the cursor is already at the edge of the screen, this has no effect.
 	 * @param integer $steps number of steps the cursor should be moved backward
 	 */
 	public static function moveCursorBackward($steps=1)
 	{
 		echo "\033[" . (int) $steps . 'D';
 	}
 	/**
 	 * Moves the terminal cursor to the beginning of the next line by sending ANSI control code CNL to the terminal.
 	 * @param integer $lines number of lines the cursor should be moved down
 	 */
 	public static function moveCursorNextLine($lines=1)
 	{
 		echo "\033[" . (int) $lines . 'E';
 	}
 	/**
 	 * Moves the terminal cursor to the beginning of the previous line by sending ANSI control code CPL to the terminal.
 	 * @param integer $lines number of lines the cursor should be moved up
 	 */
 	public static function moveCursorPrevLine($lines=1)
 	{
 		echo "\033[" . (int) $lines . 'F';
 	}
 	/**
 	 * Moves the cursor to an absolute position given as column and row by sending ANSI control code CUP or CHA to the terminal.
 	 * @param integer $column 1-based column number, 1 is the left edge of the screen.
 	 * @param integer|null $row 1-based row number, 1 is the top edge of the screen. if not set, will move cursor only in current line.
 	 */
 	public static function moveCursorTo($column, $row=null)
 	{
 		if ($row === null) {
 			echo "\033[" . (int) $column . 'G';
 		} else {
 			echo "\033[" . (int) $row . ';' . (int) $column . 'H';
 		}
 	}
 	/**
 	 * Scrolls whole page up by sending ANSI control code SU to the terminal.
 	 * New lines are added at the bottom. This is not supported by ANSI.SYS used in windows.
 	 * @param int $lines number of lines to scroll up
 	 */
 	public static function scrollUp($lines=1)
 	{
 		echo "\033[".(int)$lines."S";
 	}
 	/**
 	 * Scrolls whole page down by sending ANSI control code SD to the terminal.
 	 * New lines are added at the top. This is not supported by ANSI.SYS used in windows.
 	 * @param int $lines number of lines to scroll down
 	 */
 	public static function scrollDown($lines=1)
 	{
 		echo "\033[".(int)$lines."T";
 	}
 	/**
 	 * Saves the current cursor position by sending ANSI control code SCP to the terminal.
 	 * Position can then be restored with {@link restoreCursorPosition}.
 	 */
 	public static function saveCursorPosition()
 	{
 		echo "\033[s";
 	}
 	/**
 	 * Restores the cursor position saved with {@link saveCursorPosition} by sending ANSI control code RCP to the terminal.
 	 */
 	public static function restoreCursorPosition()
 	{
 		echo "\033[u";
 	}
 	/**
 	 * Hides the cursor by sending ANSI DECTCEM code ?25l to the terminal.
 	 * Use {@link showCursor} to bring it back.
 	 * Do not forget to show cursor when your application exits. Cursor might stay hidden in terminal after exit.
 	 */
 	public static function hideCursor()
 	{
 		echo "\033[?25l";
 	}
 	/**
 	 * Will show a cursor again when it has been hidden by {@link hideCursor}  by sending ANSI DECTCEM code ?25h to the terminal.
 	 */
 	public static function showCursor()
 	{
 		echo "\033[?25h";
 	}
 	/**
 	 * Clears entire screen content by sending ANSI control code ED with argument 2 to the terminal.
 	 * Cursor position will not be changed.
 	 * **Note:** ANSI.SYS implementation used in windows will reset cursor position to upper left corner of the screen.
 	 */
 	public static function clearScreen()
 	{
 		echo "\033[2J";
 	}
 	/**
 	 * Clears text from cursor to the beginning of the screen by sending ANSI control code ED with argument 1 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearScreenBeforeCursor()
 	{
 		echo "\033[1J";
 	}
 	/**
 	 * Clears text from cursor to the end of the screen by sending ANSI control code ED with argument 0 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearScreenAfterCursor()
 	{
 		echo "\033[0J";
 	}
 	/**
 	 * Clears the line, the cursor is currently on by sending ANSI control code EL with argument 2 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLine()
 	{
 		echo "\033[2K";
 	}
 	/**
 	 * Clears text from cursor position to the beginning of the line by sending ANSI control code EL with argument 1 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLineBeforeCursor()
 	{
 		echo "\033[1K";
 	}
 	/**
 	 * Clears text from cursor position to the end of the line by sending ANSI control code EL with argument 0 to the terminal.
 	 * Cursor position will not be changed.
 	 */
 	public static function clearLineAfterCursor()
 	{
 		echo "\033[0K";
 	}
 	/**
 	 * Will send ANSI format for following output
 	 *
 	 * You can pass any of the FG_*, BG_* and TEXT_* constants and also xterm256ColorBg
 	 * TODO: documentation
 	 */
 	public static function ansiStyle()
 	{
 		echo "\033[" . implode(';', func_get_args()) . 'm';
 	}
 	/**
 	 * Will return a string formatted with the given ANSI style
 	 *
 	 * See {@link ansiStyle} for possible arguments.
 	 * @param string $string the string to be formatted
 	 * @return string
 	 */
 	public static function ansiStyleString($string)
 	{
 		$args = func_get_args();
 		array_shift($args);
 		$code = implode(';', $args);
 		return "\033[0m" . ($code !== '' ? "\033[" . $code . "m" : '') . $string."\033[0m";
 	}
 	//const COLOR_XTERM256 = 38;// http://en.wikipedia.org/wiki/Talk:ANSI_escape_code#xterm-256colors
 	public static function xterm256ColorFg($i) // TODO naming!
 	{
 		return '38;5;'.$i;
 	}
 	public static function xterm256ColorBg($i) // TODO naming!
 	{
 		return '48;5;'.$i;
 	}
 	/**
 	 * Usage: list($w, $h) = ConsoleHelper::getScreenSize();
 	 *
 	 * @return array
 	 */
 	public static function getScreenSize()
 	{
 		// TODO implement
 		return array(150,50);
 	}
 	/**
 	 * resets any ansi style set by previous method {@link ansiStyle}
 	 * Any output after this is will have default text style.
 	 */
 	public static function reset()
 	{
 		echo "\033[0m";
 	}
 	/**
 	 * Strips ANSI control codes from a string
 	 *
 	 * @param string $string String to strip
 	 * @return string
 	 */
 	public static function strip($string)
 	{
 		return preg_replace('/\033\[[\d;]+m/', '', $string); // TODO currently only strips color
 	}
 	// TODO refactor and review
 	public static function ansiToHtml($string)
 	{
 		$tags = 0;
 		return preg_replace_callback('/\033\[[\d;]+m/', function($ansi) use (&$tags) {
 			$styleA = array();
 			foreach(explode(';', $ansi) as $controlCode)
 			{
 				switch($controlCode)
 				{
 					case static::FG_BLACK:  $style = array('color' => '#000000'); break;
 					case static::FG_BLUE:   $style = array('color' => '#000078'); break;
 					case static::FG_CYAN:   $style = array('color' => '#007878'); break;
 					case static::FG_GREEN:  $style = array('color' => '#007800'); break;
 					case static::FG_GREY:   $style = array('color' => '#787878'); break;
 					case static::FG_PURPLE: $style = array('color' => '#780078'); break;
 					case static::FG_RED:    $style = array('color' => '#780000'); break;
 					case static::FG_YELLOW: $style = array('color' => '#787800'); break;
 					case static::BG_BLACK:  $style = array('background-color' => '#000000'); break;
 					case static::BG_BLUE:   $style = array('background-color' => '#000078'); break;
 					case static::BG_CYAN:   $style = array('background-color' => '#007878'); break;
 					case static::BG_GREEN:  $style = array('background-color' => '#007800'); break;
 					case static::BG_GREY:   $style = array('background-color' => '#787878'); break;
 					case static::BG_PURPLE: $style = array('background-color' => '#780078'); break;
 					case static::BG_RED:    $style = array('background-color' => '#780000'); break;
 					case static::BG_YELLOW: $style = array('background-color' => '#787800'); break;
 					case static::BOLD:       $style = array('font-weight' => 'bold'); break;
 					case static::ITALIC:     $style = array('font-style' => 'italic'); break;
 					case static::UNDERLINE:  $style = array('text-decoration' => array('underline')); break;
 					case static::OVERLINED:  $style = array('text-decoration' => array('overline')); break;
 					case static::CROSSED_OUT:$style = array('text-decoration' => array('line-through')); break;
 					case static::BLINK:      $style = array('text-decoration' => array('blink')); break;
 					case static::NEGATIVE:   // ???
 					case static::CONCEALED:
 					case static::ENCIRCLED:
 					case static::FRAMED:
 					// TODO allow resetting codes
 					break;
 					case 0: // ansi reset
 						$return = '';
 						for($n=$tags; $tags>0; $tags--) {
 							$return .= '</span>';
 						}
 						return $return;
 				}
 				$styleA = ArrayHelper::merge($styleA, $style);
 			}
 			$styleString[] = array();
 			foreach($styleA as $name => $content) {
 				if ($name === 'text-decoration') {
 					$content = implode(' ', $content);
 				}
 				$styleString[] = $name.':'.$content;
 			}
 			$tags++;
 			return '<span' . (!empty($styleString) ? 'style="' . implode(';', $styleString) : '') . '>';
 		}, $string);
 	}
 	/**
 	 * TODO syntax copied from https://github.com/pear/Console_Color2/blob/master/Console/Color2.php
 	 *
 	 * Converts colorcodes in the format %y (for yellow) into ansi-control
 	 * codes. The conversion table is: ('bold' meaning 'light' on some
 	 * terminals). It's almost the same conversion table irssi uses.
 	 * <pre>
 	 *                  text      text            background
 	 *      ------------------------------------------------
 	 *      %k %K %0    black     dark grey       black
 	 *      %r %R %1    red       bold red        red
 	 *      %g %G %2    green     bold green      green
 	 *      %y %Y %3    yellow    bold yellow     yellow
 	 *      %b %B %4    blue      bold blue       blue
 	 *      %m %M %5    magenta   bold magenta    magenta
 	 *      %p %P       magenta (think: purple)
 	 *      %c %C %6    cyan      bold cyan       cyan
 	 *      %w %W %7    white     bold white      white
 	 *
 	 *      %F     Blinking, Flashing
 	 *      %U     Underline
 	 *      %8     Reverse
 	 *      %_,%9  Bold
 	 *
 	 *      %n     Resets the color
 	 *      %%     A single %
 	 * </pre>
 	 * First param is the string to convert, second is an optional flag if
 	 * colors should be used. It defaults to true, if set to false, the
 	 * colorcodes will just be removed (And %% will be transformed into %)
 	 *
 	 * @param string $string  String to convert
 	 * @param bool   $colored Should the string be colored?
 	 *
 	 * @return string
 	 */
 	public static function renderColoredString($string)
 	{
 		$colored = true;
 		static $conversions = array ( // static so the array doesn't get built
 		   // everytime
 		// %y - yellow, and so on... {{{
 		'%y' => array('color' => 'yellow'),
 		'%g' => array('color' => 'green' ),
 		'%b' => array('color' => 'blue'  ),
 		'%r' => array('color' => 'red'   ),
 		'%p' => array('color' => 'purple'),
 		'%m' => array('color' => 'purple'),
 		'%c' => array('color' => 'cyan'  ),
 		'%w' => array('color' => 'grey'  ),
 		'%k' => array('color' => 'black' ),
 		'%n' => array('color' => 'reset' ),
 		'%Y' => array('color' => 'yellow',  'style' => 'light'),
 		'%G' => array('color' => 'green',   'style' => 'light'),
 		'%B' => array('color' => 'blue',    'style' => 'light'),
 		'%R' => array('color' => 'red',     'style' => 'light'),
 		'%P' => array('color' => 'purple',  'style' => 'light'),
 		'%M' => array('color' => 'purple',  'style' => 'light'),
 		'%C' => array('color' => 'cyan',    'style' => 'light'),
 		'%W' => array('color' => 'grey',    'style' => 'light'),
 		'%K' => array('color' => 'black',   'style' => 'light'),
 		'%N' => array('color' => 'reset',   'style' => 'light'),
 		'%3' => array('background' => 'yellow'),
 		'%2' => array('background' => 'green' ),
 		'%4' => array('background' => 'blue'  ),
 		'%1' => array('background' => 'red'   ),
 		'%5' => array('background' => 'purple'),
 		'%6' => array('background' => 'cyan'  ),
 		'%7' => array('background' => 'grey'  ),
 		'%0' => array('background' => 'black' ),
 		// Don't use this, I can't stand flashing text
 		'%F' => array('style' => 'blink'),
 		'%U' => array('style' => 'underline'),
 		'%8' => array('style' => 'inverse'),
 		'%9' => array('style' => 'bold'),
 		'%_' => array('style' => 'bold')
 		// }}}
 		);
 		if ($colored) {
 			$string = str_replace('%%', '% ', $string);
 			foreach ($conversions as $key => $value) {
 				$string = str_replace($key, Console_Color::color($value),
 				$string);
 			}
 			$string = str_replace('% ', '%', $string);
 		} else {
 			$string = preg_replace('/%((%)|.)/', '$2', $string);
 		}
 		return $string;
 	}
 	/**
 	 * Escapes % so they don't get interpreted as color codes
 	 *
 	 * @param string $string String to escape
 	 *
 	 * @access public
 	 * @return string
 	 */
 	public static function escape($string)
 	{
 		return str_replace('%', '%%', $string);
 	}
 }
--- a/framework/helpers/base/FileHelper.php
+++ b/framework/helpers/base/FileHelper.php
@ -0,0 +1,172 @@
 <?php
 /**
 * Filesystem helper class file.
 *
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 use Yii;
 /**
 * Filesystem helper
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @author Alex Makarov <sam@rmcreative.ru>
 * @since 2.0
 */
 class FileHelper
 {
 	/**
 	 * Normalizes a file/directory path.
 	 * After normalization, the directory separators in the path will be `DIRECTORY_SEPARATOR`,
 	 * and any trailing directory separators will be removed. For example, '/home\demo/' on Linux
 	 * will be normalized as '/home/demo'.
 	 * @param string $path the file/directory path to be normalized
 	 * @param string $ds the directory separator to be used in the normalized result. Defaults to `DIRECTORY_SEPARATOR`.
 	 * @return string the normalized file/directory path
 	 */
 	public static function normalizePath($path, $ds = DIRECTORY_SEPARATOR)
 	{
 		return rtrim(strtr($path, array('/' => $ds, '\\' => $ds)), $ds);
 	}
 	/**
 	 * Returns the localized version of a specified file.
 	 *
 	 * The searching is based on the specified language code. In particular,
 	 * a file with the same name will be looked for under the subdirectory
 	 * whose name is the same as the language code. For example, given the file "path/to/view.php"
 	 * and language code "zh_CN", the localized file will be looked for as
 	 * "path/to/zh_CN/view.php". If the file is not found, the original file
 	 * will be returned.
 	 *
 	 * If the target and the source language codes are the same,
 	 * the original file will be returned.
 	 *
 	 * @param string $file the original file
 	 * @param string $language the target language that the file should be localized to.
 	 * If not set, the value of [[\yii\base\Application::language]] will be used.
 	 * @param string $sourceLanguage the language that the original file is in.
 	 * If not set, the value of [[\yii\base\Application::sourceLanguage]] will be used.
 	 * @return string the matching localized file, or the original file if the localized version is not found.
 	 * If the target and the source language codes are the same, the original file will be returned.
 	 */
 	public static function localize($file, $language = null, $sourceLanguage = null)
 	{
 		if ($language === null) {
 			$language = Yii::$app->language;
 		}
 		if ($sourceLanguage === null) {
 			$sourceLanguage = Yii::$app->sourceLanguage;
 		}
 		if ($language === $sourceLanguage) {
 			return $file;
 		}
 		$desiredFile = dirname($file) . DIRECTORY_SEPARATOR . $sourceLanguage . DIRECTORY_SEPARATOR . basename($file);
 		return is_file($desiredFile) ? $desiredFile : $file;
 	}
 	/**
 	 * Determines the MIME type of the specified file.
 	 * This method will first try to determine the MIME type based on
 	 * [finfo_open](http://php.net/manual/en/function.finfo-open.php). If this doesn't work, it will
 	 * fall back to [[getMimeTypeByExtension()]].
 	 * @param string $file the file name.
 	 * @param string $magicFile name of the optional magic database file, usually something like `/path/to/magic.mime`.
 	 * This will be passed as the second parameter to [finfo_open](http://php.net/manual/en/function.finfo-open.php).
 	 * @param boolean $checkExtension whether to use the file extension to determine the MIME type in case
 	 * `finfo_open()` cannot determine it.
 	 * @return string the MIME type (e.g. `text/plain`). Null is returned if the MIME type cannot be determined.
 	 */
 	public static function getMimeType($file, $magicFile = null, $checkExtension = true)
 	{
 		if (function_exists('finfo_open')) {
 			$info = finfo_open(FILEINFO_MIME_TYPE, $magicFile);
 			if ($info) {
 				$result = finfo_file($info, $file);
 				finfo_close($info);
 				if ($result !== false) {
 					return $result;
 				}
 			}
 		}
 		return $checkExtension ? self::getMimeTypeByExtension($file) : null;
 	}
 	/**
 	 * Determines the MIME type based on the extension name of the specified file.
 	 * This method will use a local map between extension names and MIME types.
 	 * @param string $file the file name.
 	 * @param string $magicFile the path of the file that contains all available MIME type information.
 	 * If this is not set, the default file aliased by `@yii/util/mimeTypes.php` will be used.
 	 * @return string the MIME type. Null is returned if the MIME type cannot be determined.
 	 */
 	public static function getMimeTypeByExtension($file, $magicFile = null)
 	{
 		static $mimeTypes = array();
 		if ($magicFile === null) {
 			$magicFile = __DIR__ . '/mimeTypes.php';
 		}
 		if (!isset($mimeTypes[$magicFile])) {
 			$mimeTypes[$magicFile] = require($magicFile);
 		}
 		if (($ext = pathinfo($file, PATHINFO_EXTENSION)) !== '') {
 			$ext = strtolower($ext);
 			if (isset($mimeTypes[$magicFile][$ext])) {
 				return $mimeTypes[$magicFile][$ext];
 			}
 		}
 		return null;
 	}
 	/**
 	 * Copies a whole directory as another one.
 	 * The files and sub-directories will also be copied over.
 	 * @param string $src the source directory
 	 * @param string $dst the destination directory
 	 * @param array $options options for directory copy. Valid options are:
 	 *
 	 * - dirMode: integer, the permission to be set for newly copied directories. Defaults to 0777.
 	 * - fileMode:  integer, the permission to be set for newly copied files. Defaults to the current environment setting.
 	 * - beforeCopy: callback, a PHP callback that is called before copying each sub-directory or file.
 	 *   If the callback returns false, the copy operation for the sub-directory or file will be cancelled.
 	 *   The signature of the callback should be: `function ($from, $to)`, where `$from` is the sub-directory or
 	 *   file to be copied from, while `$to` is the copy target.
 	 * - afterCopy: callback, a PHP callback that is called after a sub-directory or file is successfully copied.
 	 *   The signature of the callback is similar to that of `beforeCopy`.
 	 */
 	public static function copyDirectory($src, $dst, $options = array())
 	{
 		if (!is_dir($dst)) {
 			mkdir($dst, isset($options['dirMode']) ? $options['dirMode'] : 0777, true);
 		}
 		$handle = opendir($src);
 		while (($file = readdir($handle)) !== false) {
 			if ($file === '.' || $file === '..') {
 				continue;
 			}
 			$from = $src . DIRECTORY_SEPARATOR . $file;
 			$to = $dst . DIRECTORY_SEPARATOR . $file;
 			if (!isset($options['beforeCopy']) || call_user_func($options['beforeCopy'], $from, $to)) {
 				if (is_file($from)) {
 					copy($from, $to);
 					if (isset($options['fileMode'])) {
 						@chmod($to, $options['fileMode']);
 					}
 				} else {
 					static::copyDirectory($from, $to, $options);
 				}
 				if (isset($options['afterCopy'])) {
 					call_user_func($options['afterCopy'], $from, $to);
 				}
 			}
 		}
 		closedir($handle);
 	}
 }
--- a/framework/helpers/base/Html.php
+++ b/framework/helpers/base/Html.php
@ -0,0 +1,981 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 use Yii;
 use yii\base\InvalidParamException;
 /**
 * Html provides a set of static methods for generating commonly used HTML tags.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class Html
 {
 	/**
 	 * @var boolean whether to close void (empty) elements. Defaults to true.
 	 * @see voidElements
 	 */
 	public static $closeVoidElements = true;
 	/**
 	 * @var array list of void elements (element name => 1)
 	 * @see closeVoidElements
 	 * @see http://www.w3.org/TR/html-markup/syntax.html#void-element
 	 */
 	public static $voidElements = array(
 		'area' => 1,
 		'base' => 1,
 		'br' => 1,
 		'col' => 1,
 		'command' => 1,
 		'embed' => 1,
 		'hr' => 1,
 		'img' => 1,
 		'input' => 1,
 		'keygen' => 1,
 		'link' => 1,
 		'meta' => 1,
 		'param' => 1,
 		'source' => 1,
 		'track' => 1,
 		'wbr' => 1,
 	);
 	/**
 	 * @var boolean whether to show the values of boolean attributes in element tags.
 	 * If false, only the attribute names will be generated.
 	 * @see booleanAttributes
 	 */
 	public static $showBooleanAttributeValues = true;
 	/**
 	 * @var array list of boolean attributes. The presence of a boolean attribute on
 	 * an element represents the true value, and the absence of the attribute represents the false value.
 	 * @see showBooleanAttributeValues
 	 * @see http://www.w3.org/TR/html5/infrastructure.html#boolean-attributes
 	 */
 	public static $booleanAttributes = array(
 		'async' => 1,
 		'autofocus' => 1,
 		'autoplay' => 1,
 		'checked' => 1,
 		'controls' => 1,
 		'declare' => 1,
 		'default' => 1,
 		'defer' => 1,
 		'disabled' => 1,
 		'formnovalidate' => 1,
 		'hidden' => 1,
 		'ismap' => 1,
 		'loop' => 1,
 		'multiple' => 1,
 		'muted' => 1,
 		'nohref' => 1,
 		'noresize' => 1,
 		'novalidate' => 1,
 		'open' => 1,
 		'readonly' => 1,
 		'required' => 1,
 		'reversed' => 1,
 		'scoped' => 1,
 		'seamless' => 1,
 		'selected' => 1,
 		'typemustmatch' => 1,
 	);
 	/**
 	 * @var array the preferred order of attributes in a tag. This mainly affects the order of the attributes
 	 * that are rendered by [[renderAttributes()]].
 	 */
 	public static $attributeOrder = array(
 		'type',
 		'id',
 		'class',
 		'name',
 		'value',
 		'href',
 		'src',
 		'action',
 		'method',
 		'selected',
 		'checked',
 		'readonly',
 		'disabled',
 		'multiple',
 		'size',
 		'maxlength',
 		'width',
 		'height',
 		'rows',
 		'cols',
 		'alt',
 		'title',
 		'rel',
 		'media',
 	);
 	/**
 	 * Encodes special characters into HTML entities.
 	 * The [[yii\base\Application::charset|application charset]] will be used for encoding.
 	 * @param string $content the content to be encoded
 	 * @return string the encoded content
 	 * @see decode
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars.php
 	 */
 	public static function encode($content)
 	{
 		return htmlspecialchars($content, ENT_QUOTES, Yii::$app->charset);
 	}
 	/**
 	 * Decodes special HTML entities back to the corresponding characters.
 	 * This is the opposite of [[encode()]].
 	 * @param string $content the content to be decoded
 	 * @return string the decoded content
 	 * @see encode
 	 * @see http://www.php.net/manual/en/function.htmlspecialchars-decode.php
 	 */
 	public static function decode($content)
 	{
 		return htmlspecialchars_decode($content, ENT_QUOTES);
 	}
 	/**
 	 * Generates a complete HTML tag.
 	 * @param string $name the tag name
 	 * @param string $content the content to be enclosed between the start and end tags. It will not be HTML-encoded.
 	 * If this is coming from end users, you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated HTML tag
 	 * @see beginTag
 	 * @see endTag
 	 */
 	public static function tag($name, $content = '', $options = array())
 	{
 		$html = '<' . $name . static::renderTagAttributes($options);
 		if (isset(static::$voidElements[strtolower($name)])) {
 			return $html . (static::$closeVoidElements ? ' />' : '>');
 		} else {
 			return $html . ">$content</$name>";
 		}
 	}
 	/**
 	 * Generates a start tag.
 	 * @param string $name the tag name
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated start tag
 	 * @see endTag
 	 * @see tag
 	 */
 	public static function beginTag($name, $options = array())
 	{
 		return '<' . $name . static::renderTagAttributes($options) . '>';
 	}
 	/**
 	 * Generates an end tag.
 	 * @param string $name the tag name
 	 * @return string the generated end tag
 	 * @see beginTag
 	 * @see tag
 	 */
 	public static function endTag($name)
 	{
 		return "</$name>";
 	}
 	/**
 	 * Encloses the given content within a CDATA tag.
 	 * @param string $content the content to be enclosed within the CDATA tag
 	 * @return string the CDATA tag with the enclosed content.
 	 */
 	public static function cdata($content)
 	{
 		return '<![CDATA[' . $content . ']]>';
 	}
 	/**
 	 * Generates a style tag.
 	 * @param string $content the style content
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "text/css" will be used.
 	 * @return string the generated style tag
 	 */
 	public static function style($content, $options = array())
 	{
 		if (!isset($options['type'])) {
 			$options['type'] = 'text/css';
 		}
 		return static::tag('style', "/*<![CDATA[*/\n{$content}\n/*]]>*/", $options);
 	}
 	/**
 	 * Generates a script tag.
 	 * @param string $content the script content
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "text/javascript" will be rendered.
 	 * @return string the generated script tag
 	 */
 	public static function script($content, $options = array())
 	{
 		if (!isset($options['type'])) {
 			$options['type'] = 'text/javascript';
 		}
 		return static::tag('script', "/*<![CDATA[*/\n{$content}\n/*]]>*/", $options);
 	}
 	/**
 	 * Generates a link tag that refers to an external CSS file.
 	 * @param array|string $url the URL of the external CSS file. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated link tag
 	 * @see url
 	 */
 	public static function cssFile($url, $options = array())
 	{
 		$options['rel'] = 'stylesheet';
 		$options['type'] = 'text/css';
 		$options['href'] = static::url($url);
 		return static::tag('link', '', $options);
 	}
 	/**
 	 * Generates a script tag that refers to an external JavaScript file.
 	 * @param string $url the URL of the external JavaScript file. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated script tag
 	 * @see url
 	 */
 	public static function jsFile($url, $options = array())
 	{
 		$options['type'] = 'text/javascript';
 		$options['src'] = static::url($url);
 		return static::tag('script', '', $options);
 	}
 	/**
 	 * Generates a form start tag.
 	 * @param array|string $action the form action URL. This parameter will be processed by [[url()]].
 	 * @param string $method the form submission method, either "post" or "get" (case-insensitive)
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated form start tag.
 	 * @see endForm
 	 */
 	public static function beginForm($action = '', $method = 'post', $options = array())
 	{
 		$action = static::url($action);
 		// query parameters in the action are ignored for GET method
 		// we use hidden fields to add them back
 		$hiddens = array();
 		if (!strcasecmp($method, 'get') && ($pos = strpos($action, '?')) !== false) {
 			foreach (explode('&', substr($action, $pos + 1)) as $pair) {
 				if (($pos1 = strpos($pair, '=')) !== false) {
 					$hiddens[] = static::hiddenInput(urldecode(substr($pair, 0, $pos1)), urldecode(substr($pair, $pos1 + 1)));
 				} else {
 					$hiddens[] = static::hiddenInput(urldecode($pair), '');
 				}
 			}
 			$action = substr($action, 0, $pos);
 		}
 		$options['action'] = $action;
 		$options['method'] = $method;
 		$form = static::beginTag('form', $options);
 		if ($hiddens !== array()) {
 			$form .= "\n" . implode("\n", $hiddens);
 		}
 		return $form;
 	}
 	/**
 	 * Generates a form end tag.
 	 * @return string the generated tag
 	 * @see beginForm
 	 */
 	public static function endForm()
 	{
 		return '</form>';
 	}
 	/**
 	 * Generates a hyperlink tag.
 	 * @param string $text link body. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param array|string|null $url the URL for the hyperlink tag. This parameter will be processed by [[url()]]
 	 * and will be used for the "href" attribute of the tag. If this parameter is null, the "href" attribute
 	 * will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated hyperlink
 	 * @see url
 	 */
 	public static function a($text, $url = null, $options = array())
 	{
 		if ($url !== null) {
 			$options['href'] = static::url($url);
 		}
 		return static::tag('a', $text, $options);
 	}
 	/**
 	 * Generates a mailto hyperlink.
 	 * @param string $text link body. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param string $email email address. If this is null, the first parameter (link body) will be treated
 	 * as the email address and used.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated mailto link
 	 */
 	public static function mailto($text, $email = null, $options = array())
 	{
 		return static::a($text, 'mailto:' . ($email === null ? $text : $email), $options);
 	}
 	/**
 	 * Generates an image tag.
 	 * @param string $src the image URL. This parameter will be processed by [[url()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated image tag
 	 */
 	public static function img($src, $options = array())
 	{
 		$options['src'] = static::url($src);
 		if (!isset($options['alt'])) {
 			$options['alt'] = '';
 		}
 		return static::tag('img', null, $options);
 	}
 	/**
 	 * Generates a label tag.
 	 * @param string $content label text. It will NOT be HTML-encoded. Therefore you can pass in HTML code
 	 * such as an image tag. If this is is coming from end users, you should consider [[encode()]]
 	 * it to prevent XSS attacks.
 	 * @param string $for the ID of the HTML element that this label is associated with.
 	 * If this is null, the "for" attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated label tag
 	 */
 	public static function label($content, $for = null, $options = array())
 	{
 		$options['for'] = $for;
 		return static::tag('label', $content, $options);
 	}
 	/**
 	 * Generates a button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * If the options does not contain "type", a "type" attribute with value "button" will be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function button($name = null, $value = null, $content = 'Button', $options = array())
 	{
 		$options['name'] = $name;
 		$options['value'] = $value;
 		if (!isset($options['type'])) {
 			$options['type'] = 'button';
 		}
 		return static::tag('button', $content, $options);
 	}
 	/**
 	 * Generates a submit button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated submit button tag
 	 */
 	public static function submitButton($name = null, $value = null, $content = 'Submit', $options = array())
 	{
 		$options['type'] = 'submit';
 		return static::button($name, $value, $content, $options);
 	}
 	/**
 	 * Generates a reset button tag.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param string $content the content enclosed within the button tag. It will NOT be HTML-encoded.
 	 * Therefore you can pass in HTML code such as an image tag. If this is is coming from end users,
 	 * you should consider [[encode()]] it to prevent XSS attacks.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated reset button tag
 	 */
 	public static function resetButton($name = null, $value = null, $content = 'Reset', $options = array())
 	{
 		$options['type'] = 'reset';
 		return static::button($name, $value, $content, $options);
 	}
 	/**
 	 * Generates an input type of the given type.
 	 * @param string $type the type attribute.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated input tag
 	 */
 	public static function input($type, $name = null, $value = null, $options = array())
 	{
 		$options['type'] = $type;
 		$options['name'] = $name;
 		$options['value'] = $value;
 		return static::tag('input', null, $options);
 	}
 	/**
 	 * Generates an input button.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function buttonInput($name, $value = 'Button', $options = array())
 	{
 		return static::input('button', $name, $value, $options);
 	}
 	/**
 	 * Generates a submit input button.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function submitInput($name = null, $value = 'Submit', $options = array())
 	{
 		return static::input('submit', $name, $value, $options);
 	}
 	/**
 	 * Generates a reset input button.
 	 * @param string $name the name attribute. If it is null, the name attribute will not be generated.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the attributes of the button tag. The values will be HTML-encoded using [[encode()]].
 	 * Attributes whose value is null will be ignored and not put in the tag returned.
 	 * @return string the generated button tag
 	 */
 	public static function resetInput($name = null, $value = 'Reset', $options = array())
 	{
 		return static::input('reset', $name, $value, $options);
 	}
 	/**
 	 * Generates a text input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function textInput($name, $value = null, $options = array())
 	{
 		return static::input('text', $name, $value, $options);
 	}
 	/**
 	 * Generates a hidden input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function hiddenInput($name, $value = null, $options = array())
 	{
 		return static::input('hidden', $name, $value, $options);
 	}
 	/**
 	 * Generates a password input field.
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function passwordInput($name, $value = null, $options = array())
 	{
 		return static::input('password', $name, $value, $options);
 	}
 	/**
 	 * Generates a file input field.
 	 * To use a file input field, you should set the enclosing form's "enctype" attribute to
 	 * be "multipart/form-data". After the form is submitted, the uploaded file information
 	 * can be obtained via $_FILES[$name] (see PHP documentation).
 	 * @param string $name the name attribute.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be generated.
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated button tag
 	 */
 	public static function fileInput($name, $value = null, $options = array())
 	{
 		return static::input('file', $name, $value, $options);
 	}
 	/**
 	 * Generates a text area input.
 	 * @param string $name the input name
 	 * @param string $value the input value. Note that it will be encoded using [[encode()]].
 	 * @param array $options the tag options in terms of name-value pairs. These will be rendered as
 	 * the attributes of the resulting tag. The values will be HTML-encoded using [[encode()]].
 	 * If a value is null, the corresponding attribute will not be rendered.
 	 * @return string the generated text area tag
 	 */
 	public static function textarea($name, $value = '', $options = array())
 	{
 		$options['name'] = $name;
 		return static::tag('textarea', static::encode($value), $options);
 	}
 	/**
 	 * Generates a radio button input.
 	 * @param string $name the name attribute.
 	 * @param boolean $checked whether the radio button should be checked.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be rendered.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - uncheck: string, the value associated with the uncheck state of the radio button. When this attribute
 	 *   is present, a hidden input will be generated so that if the radio button is not checked and is submitted,
 	 *   the value of this attribute will still be submitted to the server via the hidden input.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 *
 	 * @return string the generated radio button tag
 	 */
 	public static function radio($name, $checked = false, $value = '1', $options = array())
 	{
 		$options['checked'] = $checked;
 		$options['value'] = $value;
 		if (isset($options['uncheck'])) {
 			// add a hidden field so that if the radio button is not selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['uncheck']);
 			unset($options['uncheck']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . static::input('radio', $name, $value, $options);
 	}
 	/**
 	 * Generates a checkbox input.
 	 * @param string $name the name attribute.
 	 * @param boolean $checked whether the checkbox should be checked.
 	 * @param string $value the value attribute. If it is null, the value attribute will not be rendered.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - uncheck: string, the value associated with the uncheck state of the checkbox. When this attribute
 	 *   is present, a hidden input will be generated so that if the checkbox is not checked and is submitted,
 	 *   the value of this attribute will still be submitted to the server via the hidden input.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 *
 	 * @return string the generated checkbox tag
 	 */
 	public static function checkbox($name, $checked = false, $value = '1', $options = array())
 	{
 		$options['checked'] = $checked;
 		$options['value'] = $value;
 		if (isset($options['uncheck'])) {
 			// add a hidden field so that if the checkbox is not selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['uncheck']);
 			unset($options['uncheck']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . static::input('checkbox', $name, $value, $options);
 	}
 	/**
 	 * Generates a drop-down list.
 	 * @param string $name the input name
 	 * @param string $selection the selected value
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - prompt: string, a prompt text to be displayed as the first option;
 	 * - options: array, the attributes for the select option tags. The array keys must be valid option values,
 	 *   and the array values are the extra attributes for the corresponding option tags. For example,
 	 *
 	 * ~~~
 	 * array(
 	 *     'value1' => array('disabled' => true),
 	 *     'value2' => array('label' => 'value 2'),
 	 * );
 	 * ~~~
 	 *
 	 * - groups: array, the attributes for the optgroup tags. The structure of this is similar to that of 'options',
 	 *   except that the array keys represent the optgroup labels specified in $items.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 * 
 	 * @return string the generated drop-down list tag
 	 */
 	public static function dropDownList($name, $selection = null, $items = array(), $options = array())
 	{
 		$options['name'] = $name;
 		$selectOptions = static::renderSelectOptions($selection, $items, $options);
 		return static::tag('select', "\n" . $selectOptions . "\n", $options);
 	}
 	/**
 	 * Generates a list box.
 	 * @param string $name the input name
 	 * @param string|array $selection the selected value(s)
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $options the tag options in terms of name-value pairs. The following options are supported:
 	 *
 	 * - prompt: string, a prompt text to be displayed as the first option;
 	 * - options: array, the attributes for the select option tags. The array keys must be valid option values,
 	 *   and the array values are the extra attributes for the corresponding option tags. For example,
 	 *
 	 * ~~~
 	 * array(
 	 *     'value1' => array('disabled' => true),
 	 *     'value2' => array('label' => 'value 2'),
 	 * );
 	 * ~~~
 	 *
 	 * - groups: array, the attributes for the optgroup tags. The structure of this is similar to that of 'options',
 	 *   except that the array keys represent the optgroup labels specified in $items.
 	 * - unselect: string, the value that will be submitted when no option is selected.
 	 *   When this attribute is set, a hidden field will be generated so that if no option is selected in multiple
 	 *   mode, we can still obtain the posted unselect value.
 	 *
 	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
 	 * 
 	 * @return string the generated list box tag
 	 */
 	public static function listBox($name, $selection = null, $items = array(), $options = array())
 	{
 		if (!isset($options['size'])) {
 			$options['size'] = 4;
 		}
 		if (!empty($options['multiple']) && substr($name, -2) !== '[]') {
 			$name .= '[]';
 		}
 		$options['name'] = $name;
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			if (substr($name, -2) === '[]') {
 				$name = substr($name, 0, -2);
 			}
 			$hidden = static::hiddenInput($name, $options['unselect']);
 			unset($options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		$selectOptions = static::renderSelectOptions($selection, $items, $options);
 		return $hidden . static::tag('select', "\n" . $selectOptions . "\n", $options);
 	}
 	/**
 	 * Generates a list of checkboxes.
 	 * A checkbox list allows multiple selection, like [[listBox()]].
 	 * As a result, the corresponding submitted value is an array.
 	 * @param string $name the name attribute of each checkbox.
 	 * @param string|array $selection the selected value(s).
 	 * @param array $items the data item used to generate the checkboxes.
 	 * The array keys are the labels, while the array values are the corresponding checkbox values.
 	 * Note that the labels will NOT be HTML-encoded, while the values will.
 	 * @param array $options options (name => config) for the checkbox list. The following options are supported:
 	 *
 	 * - unselect: string, the value that should be submitted when none of the checkboxes is selected.
 	 *   By setting this option, a hidden input will be generated.
 	 * - separator: string, the HTML code that separates items.
 	 * - item: callable, a callback that can be used to customize the generation of the HTML code
 	 *   corresponding to a single item in $items. The signature of this callback must be:
 	 *
 	 * ~~~
 	 * function ($index, $label, $name, $checked, $value)
 	 * ~~~
 	 *
 	 * where $index is the zero-based index of the checkbox in the whole list; $label
 	 * is the label for the checkbox; and $name, $value and $checked represent the name,
 	 * value and the checked status of the checkbox input.
 	 * @return string the generated checkbox list
 	 */
 	public static function checkboxList($name, $selection = null, $items = array(), $options = array())
 	{
 		if (substr($name, -2) !== '[]') {
 			$name .= '[]';
 		}
 		$formatter = isset($options['item']) ? $options['item'] : null;
 		$lines = array();
 		$index = 0;
 		foreach ($items as $value => $label) {
 			$checked = $selection !== null &&
 				(!is_array($selection) && !strcmp($value, $selection)
 					|| is_array($selection) && in_array($value, $selection));
 			if ($formatter !== null) {
 				$lines[] = call_user_func($formatter, $index, $label, $name, $checked, $value);
 			} else {
 				$lines[] = static::label(static::checkbox($name, $checked, $value) . ' ' . $label);
 			}
 			$index++;
 		}
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			$name2 = substr($name, -2) === '[]' ? substr($name, 0, -2) : $name;
 			$hidden = static::hiddenInput($name2, $options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		$separator = isset($options['separator']) ? $options['separator'] : "\n";
 		return $hidden . implode($separator, $lines);
 	}
 	/**
 	 * Generates a list of radio buttons.
 	 * A radio button list is like a checkbox list, except that it only allows single selection.
 	 * @param string $name the name attribute of each radio button.
 	 * @param string|array $selection the selected value(s).
 	 * @param array $items the data item used to generate the radio buttons.
 	 * The array keys are the labels, while the array values are the corresponding radio button values.
 	 * Note that the labels will NOT be HTML-encoded, while the values will.
 	 * @param array $options options (name => config) for the radio button list. The following options are supported:
 	 *
 	 * - unselect: string, the value that should be submitted when none of the radio buttons is selected.
 	 *   By setting this option, a hidden input will be generated.
 	 * - separator: string, the HTML code that separates items.
 	 * - item: callable, a callback that can be used to customize the generation of the HTML code
 	 *   corresponding to a single item in $items. The signature of this callback must be:
 	 *
 	 * ~~~
 	 * function ($index, $label, $name, $checked, $value)
 	 * ~~~
 	 *
 	 * where $index is the zero-based index of the radio button in the whole list; $label
 	 * is the label for the radio button; and $name, $value and $checked represent the name,
 	 * value and the checked status of the radio button input.
 	 * @return string the generated radio button list
 	 */
 	public static function radioList($name, $selection = null, $items = array(), $options = array())
 	{
 		$formatter = isset($options['item']) ? $options['item'] : null;
 		$lines = array();
 		$index = 0;
 		foreach ($items as $value => $label) {
 			$checked = $selection !== null &&
 				(!is_array($selection) && !strcmp($value, $selection)
 					|| is_array($selection) && in_array($value, $selection));
 			if ($formatter !== null) {
 				$lines[] = call_user_func($formatter, $index, $label, $name, $checked, $value);
 			} else {
 				$lines[] = static::label(static::radio($name, $checked, $value) . ' ' . $label);
 			}
 			$index++;
 		}
 		$separator = isset($options['separator']) ? $options['separator'] : "\n";
 		if (isset($options['unselect'])) {
 			// add a hidden field so that if the list box has no option being selected, it still submits a value
 			$hidden = static::hiddenInput($name, $options['unselect']);
 		} else {
 			$hidden = '';
 		}
 		return $hidden . implode($separator, $lines);
 	}
 	/**
 	 * Renders the option tags that can be used by [[dropDownList()]] and [[listBox()]].
 	 * @param string|array $selection the selected value(s). This can be either a string for single selection
 	 * or an array for multiple selections.
 	 * @param array $items the option data items. The array keys are option values, and the array values
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
 	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
 	 * @param array $tagOptions the $options parameter that is passed to the [[dropDownList()]] or [[listBox()]] call.
 	 * This method will take out these elements, if any: "prompt", "options" and "groups". See more details
 	 * in [[dropDownList()]] for the explanation of these elements.
 	 *
 	 * @return string the generated list options
 	 */
 	public static function renderSelectOptions($selection, $items, &$tagOptions = array())
 	{
 		$lines = array();
 		if (isset($tagOptions['prompt'])) {
 			$prompt = str_replace(' ', '&nbsp;', static::encode($tagOptions['prompt']));
 			$lines[] = static::tag('option', $prompt, array('value' => ''));
 		}
 		$options = isset($tagOptions['options']) ? $tagOptions['options'] : array();
 		$groups = isset($tagOptions['groups']) ? $tagOptions['groups'] : array();
 		unset($tagOptions['prompt'], $tagOptions['options'], $tagOptions['groups']);
 		foreach ($items as $key => $value) {
 			if (is_array($value)) {
 				$groupAttrs = isset($groups[$key]) ? $groups[$key] : array();
 				$groupAttrs['label'] = $key;
 				$attrs = array('options' => $options, 'groups' => $groups);
 				$content = static::renderSelectOptions($selection, $value, $attrs);
 				$lines[] = static::tag('optgroup', "\n" . $content . "\n", $groupAttrs);
 			} else {
 				$attrs = isset($options[$key]) ? $options[$key] : array();
 				$attrs['value'] = $key;
 				$attrs['selected'] = $selection !== null &&
 					(!is_array($selection) && !strcmp($key, $selection)
 						|| is_array($selection) && in_array($key, $selection));
 				$lines[] = static::tag('option', str_replace(' ', '&nbsp;', static::encode($value)), $attrs);
 			}
 		}
 		return implode("\n", $lines);
 	}
 	/**
 	 * Renders the HTML tag attributes.
 	 * Boolean attributes such as s 'checked', 'disabled', 'readonly', will be handled specially
 	 * according to [[booleanAttributes]] and [[showBooleanAttributeValues]].
 	 * @param array $attributes attributes to be rendered. The attribute values will be HTML-encoded using [[encode()]].
 	 * Attributes whose value is null will be ignored and not put in the rendering result.
 	 * @return string the rendering result. If the attributes are not empty, they will be rendered
 	 * into a string with a leading white space (such that it can be directly appended to the tag name
 	 * in a tag. If there is no attribute, an empty string will be returned.
 	 */
 	public static function renderTagAttributes($attributes)
 	{
 		if (count($attributes) > 1) {
 			$sorted = array();
 			foreach (static::$attributeOrder as $name) {
 				if (isset($attributes[$name])) {
 					$sorted[$name] = $attributes[$name];
 				}
 			}
 			$attributes = array_merge($sorted, $attributes);
 		}
 		$html = '';
 		foreach ($attributes as $name => $value) {
 			if (isset(static::$booleanAttributes[strtolower($name)])) {
 				if ($value || strcasecmp($name, $value) === 0) {
 					$html .= static::$showBooleanAttributeValues ? " $name=\"$name\"" : " $name";
 				}
 			} elseif ($value !== null) {
 				$html .= " $name=\"" . static::encode($value) . '"';
 			}
 		}
 		return $html;
 	}
 	/**
 	 * Normalizes the input parameter to be a valid URL.
 	 *
 	 * If the input parameter
 	 *
 	 * - is an empty string: the currently requested URL will be returned;
 	 * - is a non-empty string: it will be processed by [[Yii::getAlias()]] and returned;
 	 * - is an array: the first array element is considered a route, while the rest of the name-value
 	 *   pairs are treated as the parameters to be used for URL creation using [[\yii\web\Controller::createUrl()]].
 	 *   For example: `array('post/index', 'page' => 2)`, `array('index')`.
 	 *
 	 * @param array|string $url the parameter to be used to generate a valid URL
 	 * @return string the normalized URL
 	 * @throws InvalidParamException if the parameter is invalid.
 	 */
 	public static function url($url)
 	{
 		if (is_array($url)) {
 			if (isset($url[0])) {
 				$route = $url[0];
 				$params = array_splice($url, 1);
 				if (Yii::$app->controller !== null) {
 					return Yii::$app->controller->createUrl($route, $params);
 				} else {
 					return Yii::$app->getUrlManager()->createUrl($route, $params);
 				}
 			} else {
 				throw new InvalidParamException('The array specifying a URL must contain at least one element.');
 			}
 		} elseif ($url === '') {
 			return Yii::$app->getRequest()->getUrl();
 		} else {
 			return Yii::getAlias($url);
 		}
 	}
 }
--- a/framework/helpers/base/SecurityHelper.php
+++ b/framework/helpers/base/SecurityHelper.php
@ -0,0 +1,272 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 use Yii;
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
 use yii\base\InvalidParamException;
 /**
 * SecurityHelper provides a set of methods to handle common security-related tasks.
 *
 * In particular, SecurityHelper supports the following features:
 *
 * - Encryption/decryption: [[encrypt()]] and [[decrypt()]]
 * - Data tampering prevention: [[hashData()]] and [[validateData()]]
 * - Password validation: [[generatePasswordHash()]] and [[validatePassword()]]
 *
 * Additionally, SecurityHelper provides [[getSecretKey()]] to support generating
 * named secret keys. These secret keys, once generated, will be stored in a file
 * and made available in future requests.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @author Tom Worster <fsb@thefsb.org>
 * @since 2.0
 */
 class SecurityHelper
 {
 	/**
 	 * Encrypts data.
 	 * @param string $data data to be encrypted.
 	 * @param string $key the encryption secret key
 	 * @return string the encrypted data
 	 * @throws Exception if PHP Mcrypt extension is not loaded or failed to be initialized
 	 * @see decrypt()
 	 */
 	public static function encrypt($data, $key)
 	{
 		$module = static::openCryptModule();
 		$key = StringHelper::substr($key, 0, mcrypt_enc_get_key_size($module));
 		srand();
 		$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($module), MCRYPT_RAND);
 		mcrypt_generic_init($module, $key, $iv);
 		$encrypted = $iv . mcrypt_generic($module, $data);
 		mcrypt_generic_deinit($module);
 		mcrypt_module_close($module);
 		return $encrypted;
 	}
 	/**
 	 * Decrypts data
 	 * @param string $data data to be decrypted.
 	 * @param string $key the decryption secret key
 	 * @return string the decrypted data
 	 * @throws Exception if PHP Mcrypt extension is not loaded or failed to be initialized
 	 * @see encrypt()
 	 */
 	public static function decrypt($data, $key)
 	{
 		$module = static::openCryptModule();
 		$key = StringHelper::substr($key, 0, mcrypt_enc_get_key_size($module));
 		$ivSize = mcrypt_enc_get_iv_size($module);
 		$iv = StringHelper::substr($data, 0, $ivSize);
 		mcrypt_generic_init($module, $key, $iv);
 		$decrypted = mdecrypt_generic($module, StringHelper::substr($data, $ivSize, StringHelper::strlen($data)));
 		mcrypt_generic_deinit($module);
 		mcrypt_module_close($module);
 		return rtrim($decrypted, "\0");
 	}
 	/**
 	 * Prefixes data with a keyed hash value so that it can later be detected if it is tampered.
 	 * @param string $data the data to be protected
 	 * @param string $key the secret key to be used for generating hash
 	 * @param string $algorithm the hashing algorithm (e.g. "md5", "sha1", "sha256", etc.). Call PHP "hash_algos()"
 	 * function to see the supported hashing algorithms on your system.
 	 * @return string the data prefixed with the keyed hash
 	 * @see validateData()
 	 * @see getSecretKey()
 	 */
 	public static function hashData($data, $key, $algorithm = 'sha256')
 	{
 		return hash_hmac($algorithm, $data, $key) . $data;
 	}
 	/**
 	 * Validates if the given data is tampered.
 	 * @param string $data the data to be validated. The data must be previously
 	 * generated by [[hashData()]].
 	 * @param string $key the secret key that was previously used to generate the hash for the data in [[hashData()]].
 	 * @param string $algorithm the hashing algorithm (e.g. "md5", "sha1", "sha256", etc.). Call PHP "hash_algos()"
 	 * function to see the supported hashing algorithms on your system. This must be the same
 	 * as the value passed to [[hashData()]] when generating the hash for the data.
 	 * @return string the real data with the hash stripped off. False if the data is tampered.
 	 * @see hashData()
 	 */
 	public static function validateData($data, $key, $algorithm = 'sha256')
 	{
 		$hashSize = StringHelper::strlen(hash_hmac($algorithm, 'test', $key));
 		$n = StringHelper::strlen($data);
 		if ($n >= $hashSize) {
 			$hash = StringHelper::substr($data, 0, $hashSize);
 			$data2 = StringHelper::substr($data, $hashSize, $n - $hashSize);
 			return $hash === hash_hmac($algorithm, $data2, $key) ? $data2 : false;
 		} else {
 			return false;
 		}
 	}
 	/**
 	 * Returns a secret key associated with the specified name.
 	 * If the secret key does not exist, a random key will be generated
 	 * and saved in the file "keys.php" under the application's runtime directory
 	 * so that the same secret key can be returned in future requests.
 	 * @param string $name the name that is associated with the secret key
 	 * @param integer $length the length of the key that should be generated if not exists
 	 * @return string the secret key associated with the specified name
 	 */
 	public static function getSecretKey($name, $length = 32)
 	{
 		static $keys;
 		$keyFile = Yii::$app->getRuntimePath() . '/keys.php';
 		if ($keys === null) {
 			$keys = is_file($keyFile) ? require($keyFile) : array();
 		}
 		if (!isset($keys[$name])) {
 			// generate a 32-char random key
 			$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
 			$keys[$name] = substr(str_shuffle(str_repeat($chars, 5)), 0, $length);
 			file_put_contents($keyFile, "<?php\nreturn " . var_export($keys, true) . ";\n");
 		}
 		return $keys[$name];
 	}
 	/**
 	 * Opens the mcrypt module.
 	 * @return resource the mcrypt module handle.
 	 * @throws InvalidConfigException if mcrypt extension is not installed
 	 * @throws Exception if mcrypt initialization fails
 	 */
 	protected static function openCryptModule()
 	{
 		if (!extension_loaded('mcrypt')) {
 			throw new InvalidConfigException('The mcrypt PHP extension is not installed.');
 		}
 		$module = @mcrypt_module_open('rijndael-256', '', MCRYPT_MODE_CBC, '');
 		if ($module === false) {
 			throw new Exception('Failed to initialize the mcrypt module.');
 		}
 		return $module;
 	}
 	/**
 	 * Generates a secure hash from a password and a random salt.
 	 *
 	 * The generated hash can be stored in database (e.g. `CHAR(64) CHARACTER SET latin1` on MySQL).
 	 * Later when a password needs to be validated, the hash can be fetched and passed
 	 * to [[validatePassword()]]. For example,
 	 *
 	 * ~~~
 	 * // generates the hash (usually done during user registration or when the password is changed)
 	 * $hash = SecurityHelper::hashPassword($password);
 	 * // ...save $hash in database...
 	 *
 	 * // during login, validate if the password entered is correct using $hash fetched from database
 	 * if (PasswordHelper::verifyPassword($password, $hash) {
 	 *     // password is good
 	 * } else {
 	 *     // password is bad
 	 * }
 	 * ~~~
 	 *
 	 * @param string $password The password to be hashed.
 	 * @param integer $cost Cost parameter used by the Blowfish hash algorithm.
 	 * The higher the value of cost,
 	 * the longer it takes to generate the hash and to verify a password against it. Higher cost
 	 * therefore slows down a brute-force attack. For best protection against brute for attacks,
 	 * set it to the highest value that is tolerable on production servers. The time taken to
 	 * compute the hash doubles for every increment by one of $cost. So, for example, if the
 	 * hash takes 1 second to compute when $cost is 14 then then the compute time varies as
 	 * 2^($cost - 14) seconds.
 	 * @throws Exception on bad password parameter or cost parameter
 	 * @return string The password hash string, ASCII and not longer than 64 characters.
 	 * @see validatePassword()
 	 */
 	public static function generatePasswordHash($password, $cost = 13)
 	{
 		$salt = static::generateSalt($cost);
 		$hash = crypt($password, $salt);
 		if (!is_string($hash) || strlen($hash) < 32) {
 			throw new Exception('Unknown error occurred while generating hash.');
 		}
 		return $hash;
 	}
 	/**
 	 * Verifies a password against a hash.
 	 * @param string $password The password to verify.
 	 * @param string $hash The hash to verify the password against.
 	 * @return boolean whether the password is correct.
 	 * @throws InvalidParamException on bad password or hash parameters or if crypt() with Blowfish hash is not available.
 	 * @see generatePasswordHash()
 	 */
 	public static function validatePassword($password, $hash)
 	{
 		if (!is_string($password) || $password === '') {
 			throw new InvalidParamException('Password must be a string and cannot be empty.');
 		}
 		if (!preg_match('/^\$2[axy]\$(\d\d)\$[\./0-9A-Za-z]{22}/', $hash, $matches) || $matches[1] < 4 || $matches[1] > 30) {
 			throw new InvalidParamException('Hash is invalid.');
 		}
 		$test = crypt($password, $hash);
 		$n = strlen($test);
 		if (strlen($test) < 32 || $n !== strlen($hash)) {
 			return false;
 		}
 		// Use a for-loop to compare two strings to prevent timing attacks. See:
 		// http://codereview.stackexchange.com/questions/13512
 		$check = 0;
 		for ($i = 0; $i < $n; ++$i) {
 			$check |= (ord($test[$i]) ^ ord($hash[$i]));
 		}
 		return $check === 0;
 	}
 	/**
 	 * Generates a salt that can be used to generate a password hash.
 	 *
 	 * The PHP [crypt()](http://php.net/manual/en/function.crypt.php) built-in function
 	 * requires, for the Blowfish hash algorithm, a salt string in a specific format:
 	 * "$2a$", "$2x$" or "$2y$", a two digit cost parameter, "$", and 22 characters
 	 * from the alphabet "./0-9A-Za-z".
 	 *
 	 * @param integer $cost the cost parameter
 	 * @return string the random salt value.
 	 * @throws InvalidParamException if the cost parameter is not between 4 and 30
 	 */
 	protected static function generateSalt($cost = 13)
 	{
 		$cost = (int)$cost;
 		if ($cost < 4 || $cost > 30) {
 			throw new InvalidParamException('Cost must be between 4 and 31.');
 		}
 		// Get 20 * 8bits of pseudo-random entropy from mt_rand().
 		$rand = '';
 		for ($i = 0; $i < 20; ++$i) {
 			$rand .= chr(mt_rand(0, 255));
 		}
 		// Add the microtime for a little more entropy.
 		$rand .= microtime();
 		// Mix the bits cryptographically into a 20-byte binary string.
 		$rand = sha1($rand, true);
 		// Form the prefix that specifies Blowfish algorithm and cost parameter.
 		$salt = sprintf("$2y$%02d$", $cost);
 		// Append the random salt data in the required base64 format.
 		$salt .= str_replace('+', '.', substr(base64_encode($rand), 0, 22));
 		return $salt;
 	}
 }
--- a/framework/helpers/base/StringHelper.php
+++ b/framework/helpers/base/StringHelper.php
@ -0,0 +1,125 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 /**
 * StringHelper
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @author Alex Makarov <sam@rmcreative.ru>
 * @since 2.0
 */
 class StringHelper
 {
 	/**
 	 * Returns the number of bytes in the given string.
 	 * This method ensures the string is treated as a byte array.
 	 * It will use `mb_strlen()` if it is available.
 	 * @param string $string the string being measured for length
 	 * @return integer the number of bytes in the given string.
 	 */
 	public static function strlen($string)
 	{
 		return function_exists('mb_strlen') ? mb_strlen($string, '8bit') : strlen($string);
 	}
 	/**
 	 * Returns the portion of string specified by the start and length parameters.
 	 * This method ensures the string is treated as a byte array.
 	 * It will use `mb_substr()` if it is available.
 	 * @param string $string the input string. Must be one character or longer.
 	 * @param integer $start the starting position
 	 * @param integer $length the desired portion length
 	 * @return string the extracted part of string, or FALSE on failure or an empty string.
 	 * @see http://www.php.net/manual/en/function.substr.php
 	 */
 	public static function substr($string, $start, $length)
 	{
 		return function_exists('mb_substr') ? mb_substr($string, $start, $length, '8bit') : substr($string, $start, $length);
 	}
 	/**
 	 * Converts a word to its plural form.
 	 * Note that this is for English only!
 	 * For example, 'apple' will become 'apples', and 'child' will become 'children'.
 	 * @param string $name the word to be pluralized
 	 * @return string the pluralized word
 	 */
 	public static function pluralize($name)
 	{
 		static $rules = array(
 			'/(m)ove$/i' => '\1oves',
 			'/(f)oot$/i' => '\1eet',
 			'/(c)hild$/i' => '\1hildren',
 			'/(h)uman$/i' => '\1umans',
 			'/(m)an$/i' => '\1en',
 			'/(s)taff$/i' => '\1taff',
 			'/(t)ooth$/i' => '\1eeth',
 			'/(p)erson$/i' => '\1eople',
 			'/([m|l])ouse$/i' => '\1ice',
 			'/(x|ch|ss|sh|us|as|is|os)$/i' => '\1es',
 			'/([^aeiouy]|qu)y$/i' => '\1ies',
 			'/(?:([^f])fe|([lr])f)$/i' => '\1\2ves',
 			'/(shea|lea|loa|thie)f$/i' => '\1ves',
 			'/([ti])um$/i' => '\1a',
 			'/(tomat|potat|ech|her|vet)o$/i' => '\1oes',
 			'/(bu)s$/i' => '\1ses',
 			'/(ax|test)is$/i' => '\1es',
 			'/s$/' => 's',
 		);
 		foreach ($rules as $rule => $replacement) {
 			if (preg_match($rule, $name)) {
 				return preg_replace($rule, $replacement, $name);
 			}
 		}
 		return $name . 's';
 	}
 	/**
 	 * Converts a CamelCase name into space-separated words.
 	 * For example, 'PostTag' will be converted to 'Post Tag'.
 	 * @param string $name the string to be converted
 	 * @param boolean $ucwords whether to capitalize the first letter in each word
 	 * @return string the resulting words
 	 */
 	public static function camel2words($name, $ucwords = true)
 	{
 		$label = trim(strtolower(str_replace(array('-', '_', '.'), ' ', preg_replace('/(?<![A-Z])[A-Z]/', ' \0', $name))));
 		return $ucwords ? ucwords($label) : $label;
 	}
 	/**
 	 * Converts a CamelCase name into an ID in lowercase.
 	 * Words in the ID may be concatenated using the specified character (defaults to '-').
 	 * For example, 'PostTag' will be converted to 'post-tag'.
 	 * @param string $name the string to be converted
 	 * @param string $separator the character used to concatenate the words in the ID
 	 * @return string the resulting ID
 	 */
 	public static function camel2id($name, $separator = '-')
 	{
 		if ($separator === '_') {
 			return trim(strtolower(preg_replace('/(?<![A-Z])[A-Z]/', '_\0', $name)), '_');
 		} else {
 			return trim(strtolower(str_replace('_', $separator, preg_replace('/(?<![A-Z])[A-Z]/', $separator . '\0', $name))), $separator);
 		}
 	}
 	/**
 	 * Converts an ID into a CamelCase name.
 	 * Words in the ID separated by `$separator` (defaults to '-') will be concatenated into a CamelCase name.
 	 * For example, 'post-tag' is converted to 'PostTag'.
 	 * @param string $id the ID to be converted
 	 * @param string $separator the character used to separate the words in the ID
 	 * @return string the resulting CamelCase name
 	 */
 	public static function id2camel($id, $separator = '-')
 	{
 		return str_replace(' ', '', ucwords(implode(' ', explode($separator, $id))));
 	}
 }
--- a/framework/helpers/base/VarDumper.php
+++ b/framework/helpers/base/VarDumper.php
@ -0,0 +1,134 @@
 <?php
 /**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\helpers\base;
 /**
 * VarDumper is intended to replace the buggy PHP function var_dump and print_r.
 * It can correctly identify the recursively referenced objects in a complex
 * object structure. It also has a recursive depth control to avoid indefinite
 * recursive display of some peculiar variables.
 *
 * VarDumper can be used as follows,
 *
 * ~~~
 * VarDumper::dump($var);
 * ~~~
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class VarDumper
 {
 	private static $_objects;
 	private static $_output;
 	private static $_depth;
 	/**
 	 * Displays a variable.
 	 * This method achieves the similar functionality as var_dump and print_r
 	 * but is more robust when handling complex objects such as Yii controllers.
 	 * @param mixed $var variable to be dumped
 	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
 	 * @param boolean $highlight whether the result should be syntax-highlighted
 	 */
 	public static function dump($var, $depth = 10, $highlight = false)
 	{
 		echo self::dumpAsString($var, $depth, $highlight);
 	}
 	/**
 	 * Dumps a variable in terms of a string.
 	 * This method achieves the similar functionality as var_dump and print_r
 	 * but is more robust when handling complex objects such as Yii controllers.
 	 * @param mixed $var variable to be dumped
 	 * @param integer $depth maximum depth that the dumper should go into the variable. Defaults to 10.
 	 * @param boolean $highlight whether the result should be syntax-highlighted
 	 * @return string the string representation of the variable
 	 */
 	public static function dumpAsString($var, $depth = 10, $highlight = false)
 	{
 		self::$_output = '';
 		self::$_objects = array();
 		self::$_depth = $depth;
 		self::dumpInternal($var, 0);
 		if ($highlight) {
 			$result = highlight_string("<?php\n" . self::$_output, true);
 			self::$_output = preg_replace('/&lt;\\?php<br \\/>/', '', $result, 1);
 		}
 		return self::$_output;
 	}
 	/**
 	 * @param mixed $var variable to be dumped
 	 * @param integer $level depth level
 	 */
 	private static function dumpInternal($var, $level)
 	{
 		switch (gettype($var)) {
 			case 'boolean':
 				self::$_output .= $var ? 'true' : 'false';
 				break;
 			case 'integer':
 				self::$_output .= "$var";
 				break;
 			case 'double':
 				self::$_output .= "$var";
 				break;
 			case 'string':
 				self::$_output .= "'" . addslashes($var) . "'";
 				break;
 			case 'resource':
 				self::$_output .= '{resource}';
 				break;
 			case 'NULL':
 				self::$_output .= "null";
 				break;
 			case 'unknown type':
 				self::$_output .= '{unknown}';
 				break;
 			case 'array':
 				if (self::$_depth <= $level) {
 					self::$_output .= 'array(...)';
 				} elseif (empty($var)) {
 					self::$_output .= 'array()';
 				} else {
 					$keys = array_keys($var);
 					$spaces = str_repeat(' ', $level * 4);
 					self::$_output .= "array\n" . $spaces . '(';
 					foreach ($keys as $key) {
 						self::$_output .= "\n" . $spaces . '    ';
 						self::dumpInternal($key, 0);
 						self::$_output .= ' => ';
 						self::dumpInternal($var[$key], $level + 1);
 					}
 					self::$_output .= "\n" . $spaces . ')';
 				}
 				break;
 			case 'object':
 				if (($id = array_search($var, self::$_objects, true)) !== false) {
 					self::$_output .= get_class($var) . '#' . ($id + 1) . '(...)';
 				} elseif (self::$_depth <= $level) {
 					self::$_output .= get_class($var) . '(...)';
 				} else {
 					$id = self::$_objects[] = $var;
 					$className = get_class($var);
 					$members = (array)$var;
 					$spaces = str_repeat(' ', $level * 4);
 					self::$_output .= "$className#$id\n" . $spaces . '(';
 					foreach ($members as $key => $value) {
 						$keyDisplay = strtr(trim($key), array("\0" => ':'));
 						self::$_output .= "\n" . $spaces . "    [$keyDisplay] => ";
 						self::dumpInternal($value, $level + 1);
 					}
 					self::$_output .= "\n" . $spaces . ')';
 				}
 				break;
 		}
 	}
 }
--- a/framework/helpers/base/mimeTypes.php
+++ b/framework/helpers/base/mimeTypes.php
--- a/framework/validators/CaptchaValidator.php
+++ b/framework/validators/CaptchaValidator.php
@ -68,6 +68,7 @@ class CaptchaValidator extends Validator
 	/**
 	 * Returns the CAPTCHA action object.
 	 * @throws InvalidConfigException
 	 * @return CaptchaAction the action object
 	 */
 	public function getCaptchaAction()
--- a/framework/validators/FileValidator.php
+++ b/framework/validators/FileValidator.php
@ -175,7 +175,7 @@ class FileValidator extends Validator
 				if ($this->minSize !== null && $file->getSize() < $this->minSize) {
 					$this->addError($object, $attribute, $this->tooSmall, array('{file}' => $file->getName(), '{limit}' => $this->minSize));
 				}
-				if (!empty($this->types) && !in_array(strtolower(FileHelper::getExtension($file->getName())), $this->types, true)) {
+				if (!empty($this->types) && !in_array(strtolower(pathinfo($file->getName(), PATHINFO_EXTENSION)), $this->types, true)) {
 					$this->addError($object, $attribute, $this->wrongType, array('{file}' => $file->getName(), '{extensions}' => implode(', ', $this->types)));
 				}
 				break;
--- a/framework/validators/UniqueValidator.php
+++ b/framework/validators/UniqueValidator.php
@ -60,7 +60,7 @@ class UniqueValidator extends Validator
 		}
 		/** @var $className \yii\db\ActiveRecord */
-		$className = $this->className === null ? get_class($object) : \Yii::import($this->className);
+		$className = $this->className === null ? get_class($object) : Yii::import($this->className);
 		$attributeName = $this->attributeName === null ? $attribute : $this->attributeName;
 		$table = $className::getTableSchema();
--- a/framework/views/error.php
+++ b/framework/views/error.php
@ -4,7 +4,7 @@
 * @var \yii\base\ErrorHandler $context
 */
 $context = $this->context;
-$title = $context->htmlEncode($exception instanceof \yii\base\Exception || $exception instanceof \yii\base\ErrorException ? $exception->getName() : get_class($exception));
+$title = $context->htmlEncode($exception instanceof \yii\base\Exception ? $exception->getName() : get_class($exception));
 ?>
 <!DOCTYPE html>
 <html>
--- a/framework/views/exception.php
+++ b/framework/views/exception.php
@ -4,7 +4,7 @@
 * @var \yii\base\ErrorHandler $context
 */
 $context = $this->context;
-$title = $context->htmlEncode($exception instanceof \yii\base\Exception || $exception instanceof \yii\base\ErrorException ? $exception->getName().' ('.get_class($exception).')' : get_class($exception));
+$title = $context->htmlEncode($exception instanceof \yii\base\Exception ? $exception->getName().' ('.get_class($exception).')' : get_class($exception));
 ?>
 <!DOCTYPE html>
 <html>
--- a/framework/web/Application.php
+++ b/framework/web/Application.php
@ -98,6 +98,15 @@ class Application extends \yii\base\Application
 	}
 	/**
 	 * Returns the asset manager.
 	 * @return AssetManager the asset manager component
 	 */
 	public function getAssetManager()
 	{
 		return $this->getComponent('assetManager');
 	}
 	/**
 	 * Registers the core application components.
 	 * @see setComponents
 	 */
@ -117,6 +126,9 @@ class Application extends \yii\base\Application
 			'user' => array(
 				'class' => 'yii\web\User',
 			),
 			'assetManager' => array(
 				'class' => 'yii\web\AssetManager',
 			),
 		));
 	}
 }
--- a/framework/web/AssetBundle.php
+++ b/framework/web/AssetBundle.php
@ -0,0 +1,176 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\web;
 use Yii;
 use yii\base\InvalidConfigException;
 use yii\base\Object;
 /**
 * AssetBundle represents a collection of asset files, such as CSS, JS, images.
 *
 * Each asset bundle has a unique name that globally identifies it among all asset bundles
 * used in an application.
 *
 * An asset bundle can depend on other asset bundles. When registering an asset bundle
 * with a view, all its dependent asset bundles will be automatically registered.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class AssetBundle extends Object
 {
 	/**
 	 * @var string the root directory of the source asset files. A source asset file
 	 * is a file that is part of your source code repository of your Web application.
 	 *
 	 * You must set this property if the directory containing the source asset files
 	 * is not Web accessible (this is usually the case for extensions).
 	 *
 	 * By setting this property, the asset manager will publish the source asset files
 	 * to a Web-accessible directory [[basePath]].
 	 *
 	 * You can use either a directory or an alias of the directory.
 	 */
 	public $sourcePath;
 	/**
 	 * @var string the Web-accessible directory that contains the asset files in this bundle.
 	 *
 	 * If [[sourcePath]] is set, this property will be *overwritten* by [[AssetManager]]
 	 * when it publishes the asset files from [[sourcePath]].
 	 *
 	 * If the bundle contains any assets that are specified in terms of relative file path,
 	 * then this property must be set either manually or automatically (by asset manager via
 	 * asset publishing).
 	 *
 	 * You can use either a directory or an alias of the directory.
 	 */
 	public $basePath;
 	/**
 	 * @var string the base URL that will be prefixed to the asset files for them to
 	 * be accessed via Web server.
 	 *
 	 * If [[sourcePath]] is set, this property will be *overwritten* by [[AssetManager]]
 	 * when it publishes the asset files from [[sourcePath]].
 	 *
 	 * If the bundle contains any assets that are specified in terms of relative file path,
 	 * then this property must be set either manually or automatically (by asset manager via
 	 * asset publishing).
 	 *
 	 * You can use either a URL or an alias of the URL.
 	 */
 	public $baseUrl;
 	/**
 	 * @var array list of the bundle names that this bundle depends on
 	 */
 	public $depends = array();
 	/**
 	 * @var array list of JavaScript files that this bundle contains. Each JavaScript file can
 	 * be either a file path (without leading slash) relative to [[basePath]] or a URL representing
 	 * an external JavaScript file.
 	 *
 	 * Note that only forward slash "/" can be used as directory separator.
 	 */
 	public $js = array();
 	/**
 	 * @var array list of CSS files that this bundle contains. Each CSS file can
 	 * be either a file path (without leading slash) relative to [[basePath]] or a URL representing
 	 * an external CSS file.
 	 *
 	 * Note that only forward slash "/" can be used as directory separator.
 	 */
 	public $css = array();
 	/**
 	 * @var array the options that will be passed to [[\yii\base\View::registerJsFile()]]
 	 * when registering the JS files in this bundle.
 	 */
 	public $jsOptions = array();
 	/**
 	 * @var array the options that will be passed to [[\yii\base\View::registerCssFile()]]
 	 * when registering the CSS files in this bundle.
 	 */
 	public $cssOptions = array();
 	/**
 	 * @var array the options to be passed to [[AssetManager::publish()]] when the asset bundle
 	 * is being published.
 	 */
 	public $publishOptions = array();
 	/**
 	 * Initializes the bundle.
 	 */
 	public function init()
 	{
 		if ($this->sourcePath !== null) {
 			$this->sourcePath = rtrim(Yii::getAlias($this->sourcePath), '/\\');
 		}
 		if ($this->basePath !== null) {
 			$this->basePath = rtrim(Yii::getAlias($this->basePath), '/\\');
 		}
 		if ($this->baseUrl !== null) {
 			$this->baseUrl = rtrim(Yii::getAlias($this->baseUrl), '/');
 		}
 	}
 	/**
 	 * Registers the CSS and JS files with the given view.
 	 * This method will first register all dependent asset bundles.
 	 * It will then try to convert non-CSS or JS files (e.g. LESS, Sass) into the corresponding
 	 * CSS or JS files using [[AssetManager::converter|asset converter]].
 	 * @param \yii\base\View $view the view that the asset files to be registered with.
 	 * @throws InvalidConfigException if [[baseUrl]] or [[basePath]] is not set when the bundle
 	 * contains internal CSS or JS files.
 	 */
 	public function registerAssets($view)
 	{
 		foreach ($this->depends as $name) {
 			$view->registerAssetBundle($name);
 		}
 		$this->publish($view->getAssetManager());
 		foreach ($this->js as $js) {
 			$view->registerJsFile($js, $this->jsOptions);
 		}
 		foreach ($this->css as $css) {
 			$view->registerCssFile($css, $this->cssOptions);
 		}
 	}
 	/**
 	 * Publishes the asset bundle if its source code is not under Web-accessible directory.
 	 * @param AssetManager $am the asset manager to perform the asset publishing
 	 * @throws InvalidConfigException if [[baseUrl]] or [[basePath]] is not set when the bundle
 	 * contains internal CSS or JS files.
 	 */
 	public function publish($am)
 	{
 		if ($this->sourcePath !== null) {
 			list ($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath, $this->publishOptions);
 		}
 		$converter = $am->getConverter();
 		foreach ($this->js as $i => $js) {
 			if (strpos($js, '/') !== 0 && strpos($js, '://') === false) {
 				if (isset($this->basePath, $this->baseUrl)) {
 					$this->js[$i] = $converter->convert($js, $this->basePath, $this->baseUrl);
 				} else {
 					throw new InvalidConfigException('Both of the "baseUrl" and "basePath" properties must be set.');
 				}
 			}
 		}
 		foreach ($this->css as $i => $css) {
 			if (strpos($css, '/') !== 0 && strpos($css, '://') === false) {
 				if (isset($this->basePath, $this->baseUrl)) {
 					$this->css[$i] = $converter->convert($css, $this->basePath, $this->baseUrl);
 				} else {
 					throw new InvalidConfigException('Both of the "baseUrl" and "basePath" properties must be set.');
 				}
 			}
 		}
 	}
 }
--- a/framework/web/AssetConverter.php
+++ b/framework/web/AssetConverter.php
@ -0,0 +1,62 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\web;
 use Yii;
 use yii\base\Component;
 /**
 * AssetConverter supports conversion of several popular script formats into JS or CSS scripts.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 class AssetConverter extends Component implements IAssetConverter
 {
 	/**
 	 * @var array the commands that are used to perform the asset conversion.
 	 * The keys are the asset file extension names, and the values are the corresponding
 	 * target script types (either "css" or "js") and the commands used for the conversion.
 	 */
 	public $commands = array(
 		'less' => array('css', 'lessc {from} {to}'),
 		'scss' => array('css', 'sass {from} {to}'),
 		'sass' => array('css', 'sass {from} {to}'),
 		'styl' => array('js', 'stylus < {from} > {to}'),
 	);
 	/**
 	 * Converts a given asset file into a CSS or JS file.
 	 * @param string $asset the asset file path, relative to $basePath
 	 * @param string $basePath the directory the $asset is relative to.
 	 * @param string $baseUrl the URL corresponding to $basePath
 	 * @return string the URL to the converted asset file.
 	 */
 	public function convert($asset, $basePath, $baseUrl)
 	{
 		$pos = strrpos($asset, '.');
 		if ($pos !== false) {
 			$ext = substr($asset, $pos + 1);
 			if (isset($this->commands[$ext])) {
 				list ($ext, $command) = $this->commands[$ext];
 				$result = substr($asset, 0, $pos + 1) . $ext;
 				if (@filemtime("$basePath/$result") < filemtime("$basePath/$asset")) {
 					$output = array();
 					$command = strtr($command, array(
 						'{from}' => "$basePath/$asset",
 						'{to}' => "$basePath/$result",
 					));
 					exec($command, $output);
 					Yii::info("Converted $asset into $result: " . implode("\n", $output), __METHOD__);
 					return "$baseUrl/$result";
 				}
 			}
 		}
 		return "$baseUrl/$asset";
 	}
 }
--- a/framework/web/AssetManager.php
+++ b/framework/web/AssetManager.php
@ -1,153 +1,188 @@
 <?php
 /**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
- * @copyright Copyright &copy; 2008-2011 Yii Software LLC
+ * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\web;
 use Yii;
 use yii\base\Component;
 use yii\base\InvalidConfigException;
 use yii\base\InvalidParamException;
 use yii\helpers\FileHelper;
 /**
- * CAssetManager is a Web application component that manages private files (called assets) and makes them accessible by Web clients.
+ * AssetManager manages asset bundles and asset publishing.
 *
 * It achieves this goal by copying assets to a Web-accessible directory
 * and returns the corresponding URL for accessing them.
 *
 * To publish an asset, simply call {@link publish()}.
 *
 * The Web-accessible directory holding the published files is specified
 * by {@link setBasePath basePath}, which defaults to the "assets" directory
 * under the directory containing the application entry script file.
 * The property {@link setBaseUrl baseUrl} refers to the URL for accessing
 * the {@link setBasePath basePath}.
 *
 * @property string $basePath The root directory storing the published asset files. Defaults to 'WebRoot/assets'.
 * @property string $baseUrl The base url that the published asset files can be accessed.
 * Note, the ending slashes are stripped off. Defaults to '/AppBaseUrl/assets'.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
- * @version $Id$
+ * @since 2.0
 * @package system.web
 * @since 1.0
 */
-class CAssetManager extends CApplicationComponent
+class AssetManager extends Component
 {
 	/**
-	 * Default web accessible base path for storing private files
+	 * @var array list of available asset bundles. The keys are the bundle names, and the values are the configuration
 	 * arrays for creating the [[AssetBundle]] objects.
 	 */
 	public $bundles;
 	/**
 	 * @return string the root directory storing the published asset files.
 	 */
 	public $basePath = '@wwwroot/assets';
 	/**
 	 * @return string the base URL through which the published asset files can be accessed.
 	 */
-	const DEFAULT_BASEPATH='assets';
+	public $baseUrl = '@www/assets';
 	/**
 	 * @var boolean whether to use symbolic link to publish asset files. Defaults to false, meaning
-	 * asset files are copied to public folders. Using symbolic links has the benefit that the published
+	 * asset files are copied to [[basePath]]. Using symbolic links has the benefit that the published
-	 * assets will always be consistent with the source assets. This is especially useful during development.
+	 * assets will always be consistent with the source assets and there is no copy operation required.
 	 * This is especially useful during development.
 	 *
 	 * However, there are special requirements for hosting environments in order to use symbolic links.
 	 * In particular, symbolic links are supported only on Linux/Unix, and Windows Vista/2008 or greater.
 	 * The latter requires PHP 5.3 or greater.
 	 *
 	 * Moreover, some Web servers need to be properly configured so that the linked assets are accessible
 	 * to Web users. For example, for Apache Web server, the following configuration directive should be added
 	 * for the Web folder:
 	 * <pre>
 	 * Options FollowSymLinks
 	 * </pre>
 	 *
-	 * @since 1.1.5
+	 * ~~~
 	 * Options FollowSymLinks
 	 * ~~~
 	 */
-	public $linkAssets=false;
+	public $linkAssets = false;
 	/**
-	 * @var array list of directories and files which should be excluded from the publishing process.
+	 * @var integer the permission to be set for newly published asset files.
-	 * Defaults to exclude '.svn' and '.gitignore' files only. This option has no effect if {@link linkAssets} is enabled.
+	 * This value will be used by PHP chmod() function.
-	 * @since 1.1.6
+	 * If not set, the permission will be determined by the current environment.
 	 **/
 	public $excludeFiles=array('.svn','.gitignore');
 	/**
 	 * @var integer the permission to be set for newly generated asset files.
 	 * This value will be used by PHP chmod function.
 	 * Defaults to 0666, meaning the file is read-writable by all users.
 	 * @since 1.1.8
 	 */
-	public $newFileMode=0666;
+	public $fileMode;
 	/**
 	 * @var integer the permission to be set for newly generated asset directories.
-	 * This value will be used by PHP chmod function.
+	 * This value will be used by PHP chmod() function.
 	 * Defaults to 0777, meaning the directory can be read, written and executed by all users.
 	 * @since 1.1.8
 	 */
-	public $newDirMode=0777;
+	public $dirMode = 0777;
 	/**
 	 * @var string base web accessible path for storing private files
 	 */
 	private $_basePath;
 	/**
 	 * @var string base URL for accessing the publishing directory.
 	 */
 	private $_baseUrl;
 	/**
 	 * @var array published assets
 	 */
 	private $_published=array();
 	/**
-	 * @return string the root directory storing the published asset files. Defaults to 'WebRoot/assets'.
+	 * Initializes the component.
 	 * @throws InvalidConfigException if [[basePath]] is invalid
 	 */
-	public function getBasePath()
+	public function init()
 	{
 		if($this->_basePath===null)
 	{
-			$request=\Yii::$app->getRequest();
+		parent::init();
-			$this->setBasePath(dirname($request->getScriptFile()).DIRECTORY_SEPARATOR.self::DEFAULT_BASEPATH);
+		$this->basePath = Yii::getAlias($this->basePath);
 		if (!is_dir($this->basePath)) {
 			throw new InvalidConfigException("The directory does not exist: {$this->basePath}");
 		} elseif (!is_writable($this->basePath)) {
 			throw new InvalidConfigException("The directory is not writable by the Web process: {$this->basePath}");
 		} else {
 			$this->basePath = realpath($this->basePath);
 		}
 		$this->baseUrl = rtrim(Yii::getAlias($this->baseUrl), '/');
 		foreach (require(YII_PATH . '/assets.php') as $name => $bundle) {
 			if (!isset($this->bundles[$name])) {
 				$this->bundles[$name] = $bundle;
 			}
 		}
 		return $this->_basePath;
 	}
 	/**
-	 * Sets the root directory storing published asset files.
+	 * Returns the named bundle.
-	 * @param string $value the root directory storing published asset files
+	 * This method will first look for the bundle in [[bundles]]. If not found,
-	 * @throws CException if the base path is invalid
+	 * it will attempt to find the bundle from an installed extension using the following procedure:
 	 *
 	 * 1. Convert the bundle into a path alias;
 	 * 2. Determine the root alias and use it to locate the bundle manifest file "assets.php";
 	 * 3. Look for the bundle in the manifest file.
 	 *
 	 * For example, given the bundle name "foo/button", the method will first convert it
 	 * into the path alias "@foo/button"; since "@foo" is the root alias, it will look
 	 * for the bundle manifest file "@foo/assets.php". The manifest file should return an array
 	 * that lists the bundles used by the "foo/button" extension. The array format is the same as [[bundles]].
 	 *
 	 * @param string $name the bundle name
 	 * @return AssetBundle the loaded bundle object. Null is returned if the bundle does not exist.
 	 */
-	public function setBasePath($value)
+	public function getBundle($name)
 	{
-		if(($basePath=realpath($value))!==false && is_dir($basePath) && is_writable($basePath))
+		if (!isset($this->bundles[$name])) {
-			$this->_basePath=$basePath;
+			$rootAlias = Yii::getRootAlias("@$name");
-		else
+			if ($rootAlias !== false) {
-			throw new CException(Yii::t('yii|CAssetManager.basePath "{path}" is invalid. Please make sure the directory exists and is writable by the Web server process.',
+				$manifest = Yii::getAlias("$rootAlias/assets.php", false);
-				array('{path}'=>$value)));
+				if ($manifest !== false && is_file($manifest)) {
 					foreach (require($manifest) as $bn => $config) {
 						$this->bundles[$bn] = $config;
 					}
 				}
 			}
 			if (!isset($this->bundles[$name])) {
 				return null;
 			}
 		}
 		if (is_array($this->bundles[$name])) {
 			$config = $this->bundles[$name];
 			if (!isset($config['class'])) {
 				$config['class'] = 'yii\\web\\AssetBundle';
 				$this->bundles[$name] = Yii::createObject($config);
 			}
 		}
 		return $this->bundles[$name];
 	}
 	private $_converter;
 	/**
-	 * @return string the base url that the published asset files can be accessed.
+	 * Returns the asset converter.
-	 * Note, the ending slashes are stripped off. Defaults to '/AppBaseUrl/assets'.
+	 * @return IAssetConverter the asset converter.
 	 */
-	public function getBaseUrl()
+	public function getConverter()
 	{
 		if($this->_baseUrl===null)
 	{
-			$request=\Yii::$app->getRequest();
+		if ($this->_converter === null) {
-			$this->setBaseUrl($request->getBaseUrl().'/'.self::DEFAULT_BASEPATH);
+			$this->_converter = Yii::createObject(array(
 				'class' => 'yii\\web\\AssetConverter',
 			));
 		} elseif (is_array($this->_converter) || is_string($this->_converter)) {
 			$this->_converter = Yii::createObject($this->_converter);
 		}
-		return $this->_baseUrl;
+		return $this->_converter;
 	}
 	/**
-	 * @param string $value the base url that the published asset files can be accessed
+	 * Sets the asset converter.
 	 * @param array|IAssetConverter $value the asset converter. This can be either
 	 * an object implementing the [[IAssetConverter]] interface, or a configuration
 	 * array that can be used to create the asset converter object.
 	 */
-	public function setBaseUrl($value)
+	public function setConverter($value)
 	{
-		$this->_baseUrl=rtrim($value,'/');
+		$this->_converter = $value;
 	}
 	/**
 	 * @var array published assets
 	 */
 	private $_published = array();
 	/**
 	 * Publishes a file or a directory.
-	 * This method will copy the specified asset to a web accessible directory
+	 *
-	 * and return the URL for accessing the published asset.
+	 * This method will copy the specified file or directory to [[basePath]] so that
-	 * <ul>
+	 * it can be accessed via the Web server.
-	 * <li>If the asset is a file, its file modification time will be checked
+	 *
-	 * to avoid unnecessary file copying;</li>
+	 * If the asset is a file, its file modification time will be checked to avoid
-	 * <li>If the asset is a directory, all files and subdirectories under it will
+	 * unnecessary file copying.
-	 * be published recursively. Note, in case $forceCopy is false the method only checks the
+	 *
-	 * existence of the target directory to avoid repetitive copying.</li>
+	 * If the asset is a directory, all files and subdirectories under it will be published recursively.
-	 * </ul>
+	 * Note, in case $forceCopy is false the method only checks the existence of the target
 	 * directory to avoid repetitive copying (which is very expensive).
 	 *
 	 * By default, when publishing a directory, subdirectories and files whose name starts with a dot "."
 	 * will NOT be published. If you want to change this behavior, you may specify the "beforeCopy" option
 	 * as explained in the `$options` parameter.
 	 *
 	 * Note: On rare scenario, a race condition can develop that will lead to a
 	 * one-time-manifestation of a non-critical problem in the creation of the directory
@ -157,85 +192,85 @@ class CAssetManager extends CApplicationComponent
 	 * discussion: http://code.google.com/p/yii/issues/detail?id=2579
 	 *
 	 * @param string $path the asset (file or directory) to be published
-	 * @param boolean $hashByName whether the published directory should be named as the hashed basename.
+	 * @param array $options the options to	be applied when publishing a directory.
-	 * If false, the name will be the hash taken from dirname of the path being published and path mtime.
+	 * The following options are supported:
-	 * Defaults to false. Set true if the path being published is shared among
+	 *
-	 * different extensions.
+	 * - beforeCopy: callback, a PHP callback that is called before copying each sub-directory or file.
-	 * @param integer $level level of recursive copying when the asset is a directory.
+	 *   This option is used only when publishing a directory. If the callback returns false, the copy
-	 * Level -1 means publishing all subdirectories and files;
+	 *   operation for the sub-directory or file will be cancelled.
-	 * Level 0 means publishing only the files DIRECTLY under the directory;
+	 *   The signature of the callback should be: `function ($from, $to)`, where `$from` is the sub-directory or
-	 * level N means copying those directories that are within N levels.
+ 	 *   file to be copied from, while `$to` is the copy target.
-	 * @param boolean $forceCopy whether we should copy the asset file or directory even if it is already published before.
+	 * - afterCopy: callback, a PHP callback that is called after a sub-directory or file is successfully copied.
-	 * This parameter is set true mainly during development stage when the original
+	 *   This option is used only when publishing a directory. The signature of the callback is similar to that
-	 * assets are being constantly changed. The consequence is that the performance
+	 *   of `beforeCopy`.
-	 * is degraded, which is not a concern during development, however.
+	 * - forceCopy: boolean, whether the directory being published should be copied even if
-	 * This parameter has been available since version 1.1.2.
+	 *   it is found in the target directory. This option is used only when publishing a directory.
-	 * @return string an absolute URL to the published asset
+	 *   You may want to set this to be true during the development stage to make sure the published
-	 * @throws CException if the asset to be published does not exist.
+	 *   directory is always up-to-date. Do not set this to true on production servers as it will
 	 *   significantly degrade the performance.
 	 * @return array the path (directory or file path) and the URL that the asset is published as.
 	 * @throws InvalidParamException if the asset to be published does not exist.
 	 */
-	public function publish($path,$hashByName=false,$level=-1,$forceCopy=false)
+	public function publish($path, $options = array())
 	{
-		if(isset($this->_published[$path]))
+		if (isset($this->_published[$path])) {
 			return $this->_published[$path];
-		else if(($src=realpath($path))!==false)
+		}
 		{
 			if(is_file($src))
 			{
 				$dir=$this->hash($hashByName ? basename($src) : dirname($src).filemtime($src));
 				$fileName=basename($src);
 				$dstDir=$this->getBasePath().DIRECTORY_SEPARATOR.$dir;
 				$dstFile=$dstDir.DIRECTORY_SEPARATOR.$fileName;
-				if($this->linkAssets)
+		$src = realpath($path);
-				{
+		if ($src === false) {
-					if(!is_file($dstFile))
+			throw new InvalidParamException("The file or directory to be published does not exist: $path");
 					{
 						if(!is_dir($dstDir))
 						{
 							mkdir($dstDir);
 							@chmod($dstDir, $this->newDirMode);
 		}
-						symlink($src,$dstFile);
+
 		if (is_file($src)) {
 			$dir = $this->hash(dirname($src) . filemtime($src));
 			$fileName = basename($src);
 			$dstDir = $this->basePath . DIRECTORY_SEPARATOR . $dir;
 			$dstFile = $dstDir . DIRECTORY_SEPARATOR . $fileName;
 			if (!is_dir($dstDir)) {
 				mkdir($dstDir, $this->dirMode, true);
 			}
 			if ($this->linkAssets) {
 				if (!is_file($dstFile)) {
 					symlink($src, $dstFile);
 				}
-				else if(@filemtime($dstFile)<@filemtime($src))
+			} elseif (@filemtime($dstFile) < @filemtime($src)) {
-				{
+				copy($src, $dstFile);
-					if(!is_dir($dstDir))
+				if ($this->fileMode !== null) {
-					{
+					@chmod($dstFile, $this->fileMode);
 						mkdir($dstDir);
 						@chmod($dstDir, $this->newDirMode);
 				}
 					copy($src,$dstFile);
 					@chmod($dstFile, $this->newFileMode);
 			}
-				return $this->_published[$path]=$this->getBaseUrl()."/$dir/$fileName";
+			return $this->_published[$path] = array($dstFile, $this->baseUrl . "/$dir/$fileName");
 		} else {
 			$dir = $this->hash($src . filemtime($src));
 			$dstDir = $this->basePath . DIRECTORY_SEPARATOR . $dir;
 			if ($this->linkAssets) {
 				if (!is_dir($dstDir)) {
 					symlink($src, $dstDir);
 				}
-			else if(is_dir($src))
+			} elseif (!is_dir($dstDir) || !empty($options['forceCopy'])) {
-			{
+				$opts = array(
-				$dir=$this->hash($hashByName ? basename($src) : $src.filemtime($src));
+					'dirMode' => $this->dirMode,
-				$dstDir=$this->getBasePath().DIRECTORY_SEPARATOR.$dir;
+					'fileMode' => $this->fileMode,
-
+				);
-				if($this->linkAssets)
+				if (isset($options['beforeCopy'])) {
-				{
+					$opts['beforeCopy'] = $options['beforeCopy'];
-					if(!is_dir($dstDir))
+				} else {
-						symlink($src,$dstDir);
+					$opts['beforeCopy'] = function ($from, $to) {
 						return strncmp(basename($from), '.', 1) !== 0;
 					};
 				}
-				else if(!is_dir($dstDir) || $forceCopy)
+				if (isset($options['afterCopy'])) {
-				{
+					$opts['afterCopy'] = $options['afterCopy'];
 					CFileHelper::copyDirectory($src,$dstDir,array(
 						'exclude'=>$this->excludeFiles,
 						'level'=>$level,
 						'newDirMode'=>$this->newDirMode,
 						'newFileMode'=>$this->newFileMode,
 					));
 				}
-
+				FileHelper::copyDirectory($src, $dstDir, $opts);
 				return $this->_published[$path]=$this->getBaseUrl().'/'.$dir;
 			}
 			return $this->_published[$path] = array($dstDir, $this->baseUrl . '/' . $dir);
 		}
 		throw new CException(Yii::t('yii|The asset "{asset}" to be published does not exist.',
 			array('{asset}'=>$path)));
 	}
 	/**
@ -243,51 +278,44 @@ class CAssetManager extends CApplicationComponent
 	 * This method does not perform any publishing. It merely tells you
 	 * if the file or directory is published, where it will go.
 	 * @param string $path directory or file path being published
 	 * @param boolean $hashByName whether the published directory should be named as the hashed basename.
 	 * If false, the name will be the hash taken from dirname of the path being published and path mtime.
 	 * Defaults to false. Set true if the path being published is shared among
 	 * different extensions.
 	 * @return string the published file path. False if the file or directory does not exist
 	 */
-	public function getPublishedPath($path,$hashByName=false)
+	public function getPublishedPath($path)
 	{
 		if(($path=realpath($path))!==false)
 	{
-			$base=$this->getBasePath().DIRECTORY_SEPARATOR;
+		if (($path = realpath($path)) !== false) {
-			if(is_file($path))
+			$base = $this->basePath . DIRECTORY_SEPARATOR;
-				return $base . $this->hash($hashByName ? basename($path) : dirname($path).filemtime($path)) . DIRECTORY_SEPARATOR . basename($path);
+			if (is_file($path)) {
-			else
+				return $base . $this->hash(dirname($path) . filemtime($path)) . DIRECTORY_SEPARATOR . basename($path);
-				return $base . $this->hash($hashByName ? basename($path) : $path.filemtime($path));
+			} else {
 				return $base . $this->hash($path . filemtime($path));
 			}
-		else
+		} else {
 			return false;
 		}
 	}
 	/**
 	 * Returns the URL of a published file path.
 	 * This method does not perform any publishing. It merely tells you
 	 * if the file path is published, what the URL will be to access it.
 	 * @param string $path directory or file path being published
 	 * @param boolean $hashByName whether the published directory should be named as the hashed basename.
 	 * If false, the name will be the hash taken from dirname of the path being published and path mtime.
 	 * Defaults to false. Set true if the path being published is shared among
 	 * different extensions.
 	 * @return string the published URL for the file or directory. False if the file or directory does not exist.
 	 */
-	public function getPublishedUrl($path,$hashByName=false)
+	public function getPublishedUrl($path)
 	{
-		if(isset($this->_published[$path]))
+		if (isset($this->_published[$path])) {
 			return $this->_published[$path];
 		if(($path=realpath($path))!==false)
 		{
 			if(is_file($path))
 				return $this->getBaseUrl().'/'.$this->hash($hashByName ? basename($path) : dirname($path).filemtime($path)).'/'.basename($path);
 			else
 				return $this->getBaseUrl().'/'.$this->hash($hashByName ? basename($path) : $path.filemtime($path));
 		}
-		else
+		if (($path = realpath($path)) !== false) {
 			if (is_file($path)) {
 				return $this->baseUrl . '/' . $this->hash(dirname($path) . filemtime($path)) . '/' . basename($path);
 			} else {
 				return $this->baseUrl . '/' . $this->hash($path . filemtime($path));
 			}
 		} else {
 			return false;
 		}
 	}
 	/**
 	 * Generate a CRC32 hash for the directory path. Collisions are higher
@ -297,6 +325,6 @@ class CAssetManager extends CApplicationComponent
 	 */
 	protected function hash($path)
 	{
-		return sprintf('%x',crc32($path.Yii::getVersion()));
+		return sprintf('%x', crc32($path . Yii::getVersion()));
 	}
 }
--- a/framework/web/IAssetConverter.php
+++ b/framework/web/IAssetConverter.php
@ -0,0 +1,27 @@
 <?php
 /**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */
 namespace yii\web;
 /**
 * The IAssetConverter interface must be implemented by asset converter classes.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
 interface IAssetConverter
 {
 	/**
 	 * Converts a given asset file into a CSS or JS file.
 	 * @param string $asset the asset file path, relative to $basePath
 	 * @param string $basePath the directory the $asset is relative to.
 	 * @param string $baseUrl the URL corresponding to $basePath
 	 * @return string the URL to the converted asset file. If the given asset does not
 	 * need conversion, "$baseUrl/$asset" should be returned.
 	 */
 	public function convert($asset, $basePath, $baseUrl);
 }
--- a/framework/web/Response.php
+++ b/framework/web/Response.php
@ -112,8 +112,8 @@ class Response extends \yii\base\Response
 	 * <li>mimeType: mime type of the file, if not set it will be guessed automatically based on the file name, if set to null no content-type header will be sent.</li>
 	 * <li>xHeader: appropriate x-sendfile header, defaults to "X-Sendfile"</li>
 	 * <li>terminate: whether to terminate the current application after calling this method, defaults to true</li>
-	 * <li>forceDownload: specifies whether the file will be downloaded or shown inline, defaults to true. (Since version 1.1.9.)</li>
+	 * <li>forceDownload: specifies whether the file will be downloaded or shown inline, defaults to true</li>
-	 * <li>addHeaders: an array of additional http headers in header-value pairs (available since version 1.1.10)</li>
+	 * <li>addHeaders: an array of additional http headers in header-value pairs</li>
 	 * </ul>
 	 */
 	public function xSendFile($filePath, $options = array())
--- a/framework/web/Sort.php
+++ b/framework/web/Sort.php
@ -216,7 +216,7 @@ class Sort extends \yii\base\Object
 		$url = $this->createUrl($attribute);
-		return Html::link($label, $url, $htmlOptions);
+		return Html::a($label, $url, $htmlOptions);
 	}
 	private $_attributeOrders;
--- a/framework/web/UrlManager.php
+++ b/framework/web/UrlManager.php
@ -74,9 +74,6 @@ class UrlManager extends Component
 	public function init()
 	{
 		parent::init();
 		if (is_string($this->cache)) {
 			$this->cache = Yii::$app->getComponent($this->cache);
 		}
 		$this->compileRules();
 	}
@ -88,6 +85,9 @@ class UrlManager extends Component
 		if (!$this->enablePrettyUrl || $this->rules === array()) {
 			return;
 		}
 		if (is_string($this->cache)) {
 			$this->cache = Yii::$app->getComponent($this->cache);
 		}
 		if ($this->cache instanceof Cache) {
 			$key = $this->cache->buildKey(__CLASS__);
 			$hash = md5(json_encode($this->rules));
@ -104,7 +104,7 @@ class UrlManager extends Component
 			$this->rules[$i] = Yii::createObject($rule);
 		}
-		if ($this->cache instanceof Cache) {
+		if (isset($key, $hash)) {
 			$this->cache->set($key, array($this->rules, $hash));
 		}
 	}
--- a/framework/web/User.php
+++ b/framework/web/User.php
@ -32,7 +32,7 @@ class User extends Component
 	const EVENT_AFTER_LOGOUT = 'afterLogout';
 	/**
-	 * @var string the class name of the [[identity]] object.
+	 * @var string the class name or alias of the [[identity]] object.
 	 */
 	public $identityClass;
 	/**
@ -131,7 +131,7 @@ class User extends Component
 				$this->_identity = null;
 			} else {
 				/** @var $class Identity */
-				$class = $this->identityClass;
+				$class = Yii::import($this->identityClass);
 				$this->_identity = $class::findIdentity($id);
 			}
 		}
--- a/framework/widgets/ActiveForm.php
+++ b/framework/widgets/ActiveForm.php
@ -39,10 +39,16 @@ class ActiveForm extends Widget
 	public $errorMessageClass = 'yii-error-message';
 	/**
 	 * @var string the default CSS class that indicates an input has error.
 	 * This is
 	 */
 	public $errorClass = 'yii-error';
 	/**
 	 * @var string the default CSS class that indicates an input validated successfully.
 	 */
 	public $successClass = 'yii-success';
 	/**
 	 * @var string the default CSS class that indicates an input is currently being validated.
 	 */
 	public $validatingClass = 'yii-validating';
 	/**
 	 * @var boolean whether to enable client-side data validation. Defaults to false.
@ -64,7 +70,7 @@ class ActiveForm extends Widget
 			$models = array($models);
 		}
-		$showAll = isset($options['showAll']) && $options['showAll'];
+		$showAll = !empty($options['showAll']);
 		$lines = array();
 		/** @var $model Model */
 		foreach ($models as $model) {
@ -127,6 +133,14 @@ class ActiveForm extends Widget
 		return Html::label($label, $for, $options);
 	}
 	/**
 	 * @param string $type
 	 * @param Model $model
 	 * @param string $attribute
 	 * @param array $options
 	 *
 	 * @return string
 	 */
 	public function input($type, $model, $attribute, $options = array())
 	{
 		$value = $this->getAttributeValue($model, $attribute);
--- a/framework/widgets/Block.php
+++ b/framework/widgets/Block.php
@ -7,28 +7,26 @@
 namespace yii\widgets;
 use Yii;
 use yii\base\Widget;
 use yii\base\View;
 /**
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
-class Clip extends Widget
+class Block extends Widget
 {
 	/**
-	 * @var string the ID of this clip.
+	 * @var string the ID of this block.
 	 */
 	public $id;
 	/**
-	 * @var boolean whether to render the clip content in place. Defaults to false,
+	 * @var boolean whether to render the block content in place. Defaults to false,
-	 * meaning the captured clip will not be displayed.
+	 * meaning the captured block content will not be displayed.
 	 */
 	public $renderInPlace = false;
 	/**
-	 * Starts recording a clip.
+	 * Starts recording a block.
 	 */
 	public function init()
 	{
@ -37,15 +35,15 @@ class Clip extends Widget
 	}
 	/**
-	 * Ends recording a clip.
+	 * Ends recording a block.
-	 * This method stops output buffering and saves the rendering result as a named clip in the controller.
+	 * This method stops output buffering and saves the rendering result as a named block in the controller.
 	 */
 	public function run()
 	{
-		$clip = ob_get_clean();
+		$block = ob_get_clean();
-		if ($this->renderClip) {
+		if ($this->renderInPlace) {
-			echo $clip;
+			echo $block;
 		}
-		$this->view->clips[$this->id] = $clip;
+		$this->view->blocks[$this->id] = $block;
 	}
 }
--- a/framework/yiic.php
+++ b/framework/yiic.php
@ -14,10 +14,9 @@ defined('STDIN') or define('STDIN', fopen('php://stdin', 'r'));
 require(__DIR__ . '/yii.php');
-$id = 'yiic';
+$application = new yii\console\Application(array(
-$basePath = __DIR__ . '/console';
+	'id' => 'yiic',
-
+	'basePath' => __DIR__ . '/console',
 $application = new yii\console\Application($id, $basePath, array(
 	'controllerPath' => '@yii/console/controllers',
 ));
 $application->run();
--- a/tests/unit/bootstrap.php
+++ b/tests/unit/bootstrap.php
@ -9,4 +9,6 @@ require_once(__DIR__ . '/../../framework/yii.php');
 Yii::setAlias('@yiiunit', __DIR__);
 new \yii\web\Application(array('id' => 'testapp', 'basePath' => __DIR__));
 require_once(__DIR__ . '/TestCase.php');
--- a/tests/unit/framework/YiiBaseTest.php
+++ b/tests/unit/framework/YiiBaseTest.php
@ -1,6 +1,7 @@
 <?php
 namespace yiiunit\framework;
 use Yii;
 use yiiunit\TestCase;
 /**
@ -8,19 +9,50 @@ use yiiunit\TestCase;
 */
 class YiiBaseTest extends TestCase
 {
 	public $aliases;
 	public function setUp()
 	{
 		$this->aliases = Yii::$aliases;
 	}
 	public function tearDown()
 	{
 		Yii::$aliases = $this->aliases;
 	}
 	public function testAlias()
 	{
 		$this->assertEquals(YII_PATH, Yii::getAlias('@yii'));
 		Yii::$aliases = array();
 		$this->assertFalse(Yii::getAlias('@yii', false));
 		Yii::setAlias('@yii', '/yii/framework');
 		$this->assertEquals('/yii/framework', Yii::getAlias('@yii'));
 		$this->assertEquals('/yii/framework/test/file', Yii::getAlias('@yii/test/file'));
 		Yii::setAlias('@yii/gii', '/yii/gii');
 		$this->assertEquals('/yii/framework', Yii::getAlias('@yii'));
 		$this->assertEquals('/yii/framework/test/file', Yii::getAlias('@yii/test/file'));
 		$this->assertEquals('/yii/gii', Yii::getAlias('@yii/gii'));
 		$this->assertEquals('/yii/gii/file', Yii::getAlias('@yii/gii/file'));
 		Yii::setAlias('@tii', '@yii/test');
 		$this->assertEquals('/yii/framework/test', Yii::getAlias('@tii'));
 		Yii::setAlias('@yii', null);
 		$this->assertFalse(Yii::getAlias('@yii', false));
 		$this->assertEquals('/yii/gii/file', Yii::getAlias('@yii/gii/file'));
 	}
 	public function testGetVersion()
 	{
-		echo \Yii::getVersion();
+		echo Yii::getVersion();
 		$this->assertTrue((boolean)preg_match('~\d+\.\d+(?:\.\d+)?(?:-\w+)?~', \Yii::getVersion()));
 	}
 	public function testPowered()
 	{
-		$this->assertTrue(is_string(\Yii::powered()));
+		$this->assertTrue(is_string(Yii::powered()));
 	}
 }
--- a/tests/unit/framework/base/ModelTest.php
+++ b/tests/unit/framework/base/ModelTest.php
@ -195,7 +195,7 @@ class ModelTest extends TestCase
 	public function testCreateValidators()
 	{
-		$this->setExpectedException('yii\base\InvalidConfigException', 'Invalid validation rule: a rule must be an array specifying both attribute names and validator type.');
+		$this->setExpectedException('yii\base\InvalidConfigException', 'Invalid validation rule: a rule must specify both attribute names and validator type.');
 		$invalid = new InvalidRulesModel();
 		$invalid->createValidators();
--- a/tests/unit/framework/caching/CacheTest.php
+++ b/tests/unit/framework/caching/CacheTest.php
@ -16,9 +16,9 @@ abstract class CacheTest extends TestCase
 	public function testSet()
 	{
 		$cache = $this->getCacheInstance();
-		$cache->set('string_test', 'string_test');
+		$this->assertTrue($cache->set('string_test', 'string_test'));
-		$cache->set('number_test', 42);
+		$this->assertTrue($cache->set('number_test', 42));
-		$cache->set('array_test', array('array_test' => 'array_test'));
+		$this->assertTrue($cache->set('array_test', array('array_test' => 'array_test')));
 		$cache['arrayaccess_test'] = new \stdClass();
 	}
@ -45,7 +45,7 @@ abstract class CacheTest extends TestCase
 	public function testExpire()
 	{
 		$cache = $this->getCacheInstance();
-		$cache->set('expire_test', 'expire_test', 2);
+		$this->assertTrue($cache->set('expire_test', 'expire_test', 2));
 		sleep(1);
 		$this->assertEquals('expire_test', $cache->get('expire_test'));
 		sleep(2);
@ -57,11 +57,11 @@ abstract class CacheTest extends TestCase
 		$cache = $this->getCacheInstance();
 		// should not change existing keys
-		$cache->add('number_test', 13);
+		$this->assertFalse($cache->add('number_test', 13));
 		$this->assertEquals(42, $cache->get('number_test'));
 		// should store data is it's not there yet
-		$cache->add('add_test', 13);
+		$this->assertTrue($cache->add('add_test', 13));
 		$this->assertEquals(13, $cache->get('add_test'));
 	}
@ -69,14 +69,14 @@ abstract class CacheTest extends TestCase
 	{
 		$cache = $this->getCacheInstance();
-		$cache->delete('number_test');
+		$this->assertTrue($cache->delete('number_test'));
 		$this->assertEquals(null, $cache->get('number_test'));
 	}
 	public function testFlush()
 	{
 		$cache = $this->getCacheInstance();
-		$cache->flush();
+		$this->assertTrue($cache->flush());
 		$this->assertEquals(null, $cache->get('add_test'));
 	}
 }
--- a/tests/unit/framework/helpers/HtmlTest.php
+++ b/tests/unit/framework/helpers/HtmlTest.php
@ -22,6 +22,14 @@ class HtmlTest extends \yii\test\TestCase
 		));
 	}
 	public function assertEqualsWithoutLE($expected, $actual)
 	{
 		$expected = str_replace("\r\n", "\n", $expected);
 		$actual = str_replace("\r\n", "\n", $actual);
 		$this->assertEquals($expected, $actual);
 	}
 	public function tearDown()
 	{
 		Yii::$app = null;
@ -240,21 +248,21 @@ class HtmlTest extends \yii\test\TestCase
 </select>
 EOD;
-		$this->assertEquals($expected, Html::dropDownList('test'));
+		$this->assertEqualsWithoutLE($expected, Html::dropDownList('test'));
 		$expected = <<<EOD
 <select name="test">
 <option value="value1">text1</option>
 <option value="value2">text2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::dropDownList('test', null, $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::dropDownList('test', null, $this->getDataItems()));
 		$expected = <<<EOD
 <select name="test">
 <option value="value1">text1</option>
 <option value="value2" selected="selected">text2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::dropDownList('test', 'value2', $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::dropDownList('test', 'value2', $this->getDataItems()));
 	}
 	public function testListBox()
@ -264,48 +272,48 @@ EOD;
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test'));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test'));
 		$expected = <<<EOD
 <select name="test" size="5">
 <option value="value1">text1</option>
 <option value="value2">text2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', null, $this->getDataItems(), array('size' => 5)));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', null, $this->getDataItems(), array('size' => 5)));
 		$expected = <<<EOD
 <select name="test" size="4">
 <option value="value1&lt;&gt;">text1&lt;&gt;</option>
 <option value="value  2">text&nbsp;&nbsp;2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', null, $this->getDataItems2()));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', null, $this->getDataItems2()));
 		$expected = <<<EOD
 <select name="test" size="4">
 <option value="value1">text1</option>
 <option value="value2" selected="selected">text2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', 'value2', $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', 'value2', $this->getDataItems()));
 		$expected = <<<EOD
 <select name="test" size="4">
 <option value="value1" selected="selected">text1</option>
 <option value="value2" selected="selected">text2</option>
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', array('value1', 'value2'), $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', array('value1', 'value2'), $this->getDataItems()));
 		$expected = <<<EOD
 <select name="test[]" multiple="multiple" size="4">
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', null, array(), array('multiple' => true)));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', null, array(), array('multiple' => true)));
 		$expected = <<<EOD
 <input type="hidden" name="test" value="0" /><select name="test" size="4">
 </select>
 EOD;
-		$this->assertEquals($expected, Html::listBox('test', '', array(), array('unselect' => '0')));
+		$this->assertEqualsWithoutLE($expected, Html::listBox('test', '', array(), array('unselect' => '0')));
 	}
 	public function testCheckboxList()
@ -316,19 +324,19 @@ EOD;
 <label><input type="checkbox" name="test[]" value="value1" /> text1</label>
 <label><input type="checkbox" name="test[]" value="value2" checked="checked" /> text2</label>
 EOD;
-		$this->assertEquals($expected, Html::checkboxList('test', array('value2'), $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::checkboxList('test', array('value2'), $this->getDataItems()));
 		$expected = <<<EOD
 <label><input type="checkbox" name="test[]" value="value1&lt;&gt;" /> text1<></label>
 <label><input type="checkbox" name="test[]" value="value  2" /> text  2</label>
 EOD;
-		$this->assertEquals($expected, Html::checkboxList('test', array('value2'), $this->getDataItems2()));
+		$this->assertEqualsWithoutLE($expected, Html::checkboxList('test', array('value2'), $this->getDataItems2()));
 		$expected = <<<EOD
 <input type="hidden" name="test" value="0" /><label><input type="checkbox" name="test[]" value="value1" /> text1</label><br />
 <label><input type="checkbox" name="test[]" value="value2" checked="checked" /> text2</label>
 EOD;
-		$this->assertEquals($expected, Html::checkboxList('test', array('value2'), $this->getDataItems(), array(
+		$this->assertEqualsWithoutLE($expected, Html::checkboxList('test', array('value2'), $this->getDataItems(), array(
 			'separator' => "<br />\n",
 			'unselect' => '0',
 		)));
@ -337,7 +345,7 @@ EOD;
 0<label>text1 <input type="checkbox" name="test[]" value="value1" /></label>
 1<label>text2 <input type="checkbox" name="test[]" value="value2" checked="checked" /></label>
 EOD;
-		$this->assertEquals($expected, Html::checkboxList('test', array('value2'), $this->getDataItems(), array(
+		$this->assertEqualsWithoutLE($expected, Html::checkboxList('test', array('value2'), $this->getDataItems(), array(
 			'item' => function ($index, $label, $name, $checked, $value) {
 				return $index . Html::label($label . ' ' . Html::checkbox($name, $checked, $value));
 			}
@ -352,19 +360,19 @@ EOD;
 <label><input type="radio" name="test" value="value1" /> text1</label>
 <label><input type="radio" name="test" value="value2" checked="checked" /> text2</label>
 EOD;
-		$this->assertEquals($expected, Html::radioList('test', array('value2'), $this->getDataItems()));
+		$this->assertEqualsWithoutLE($expected, Html::radioList('test', array('value2'), $this->getDataItems()));
 		$expected = <<<EOD
 <label><input type="radio" name="test" value="value1&lt;&gt;" /> text1<></label>
 <label><input type="radio" name="test" value="value  2" /> text  2</label>
 EOD;
-		$this->assertEquals($expected, Html::radioList('test',  array('value2'), $this->getDataItems2()));
+		$this->assertEqualsWithoutLE($expected, Html::radioList('test',  array('value2'), $this->getDataItems2()));
 		$expected = <<<EOD
 <input type="hidden" name="test" value="0" /><label><input type="radio" name="test" value="value1" /> text1</label><br />
 <label><input type="radio" name="test" value="value2" checked="checked" /> text2</label>
 EOD;
-		$this->assertEquals($expected, Html::radioList('test', array('value2'), $this->getDataItems(), array(
+		$this->assertEqualsWithoutLE($expected, Html::radioList('test', array('value2'), $this->getDataItems(), array(
 			'separator' => "<br />\n",
 			'unselect' => '0',
 		)));
@ -373,7 +381,7 @@ EOD;
 0<label>text1 <input type="radio" name="test" value="value1" /></label>
 1<label>text2 <input type="radio" name="test" value="value2" checked="checked" /></label>
 EOD;
-		$this->assertEquals($expected, Html::radioList('test', array('value2'), $this->getDataItems(), array(
+		$this->assertEqualsWithoutLE($expected, Html::radioList('test', array('value2'), $this->getDataItems(), array(
 			'item' => function ($index, $label, $name, $checked, $value) {
 				return $index . Html::label($label . ' ' . Html::radio($name, $checked, $value));
 			}
@ -420,7 +428,7 @@ EOD;
 				'group12' => array('class' => 'group'),
 			),
 		);
-		$this->assertEquals($expected, Html::renderSelectOptions(array('value111', 'value1'), $data, $attributes));
+		$this->assertEqualsWithoutLE($expected, Html::renderSelectOptions(array('value111', 'value1'), $data, $attributes));
 	}
 	public function testRenderAttributes()