Merge pull request #163 from creocoder/array-to-empty

=== array() => empty() && !== array() => !empty()

framework/YiiBase.php

@@ -451,12 +451,12 @@ class YiiBase
 			}
 			$args = func_get_args();
 			array_shift($args); // remove $config
-			if ($config !== array()) {
+			if (!empty($config)) {
 				$args[] = $config;
 			}
 			return $reflection->newInstanceArgs($args);
 		} else {
-			return $config === array() ? new $class : new $class($config);
+			return empty($config) ? new $class : new $class($config);
 		}
 	}
 

framework/base/Controller.php

@@ -183,7 +183,7 @@ class Controller extends Component
 			}
 		}
 
-		if ($missing !== array()) {
+		if (!empty($missing)) {
 			throw new InvalidRequestException(Yii::t('yii|Missing required parameters: {params}', array(
 				'{params}' => implode(', ', $missing),
 			)));

framework/base/Dictionary.php

@@ -51,7 +51,7 @@ class Dictionary extends Object implements \IteratorAggregate, \ArrayAccess, \Co
 	 */
 	public function __construct($data = array(), $config = array())
 	{
-		if ($data !== array()) {
+		if (!empty($data)) {
 			$this->copyFrom($data);
 		}
 		parent::__construct($config);
@@ -187,7 +187,7 @@ class Dictionary extends Object implements \IteratorAggregate, \ArrayAccess, \Co
 	public function copyFrom($data)
 	{
 		if (is_array($data) || $data instanceof \Traversable) {
-			if ($this->_d !== array()) {
+			if (!empty($this->_d)) {
 				$this->removeAll();
 			}
 			if ($data instanceof self) {

framework/base/Vector.php

@@ -58,7 +58,7 @@ class Vector extends Object implements \IteratorAggregate, \ArrayAccess, \Counta
 	 */
 	public function __construct($data = array(), $config = array())
 	{
-		if ($data !== array()) {
+		if (!empty($data)) {
 			$this->copyFrom($data);
 		}
 		parent::__construct($config);

framework/console/Controller.php

@@ -45,7 +45,7 @@ class Controller extends \yii\base\Controller
 	 */
 	public function runAction($id, $params = array())
 	{
-		if ($params !== array()) {
+		if (!empty($params)) {
 			$options = $this->globalOptions();
 			foreach ($params as $name => $value) {
 				if (in_array($name, $options, true)) {
@@ -69,7 +69,7 @@ class Controller extends \yii\base\Controller
 	 */
 	public function bindActionParams($action, $params)
 	{
-		if ($params !== array()) {
+		if (!empty($params)) {
 			$options = $this->globalOptions();
 			foreach ($params as $name => $value) {
 				if (in_array($name, $options, true)) {
@@ -81,7 +81,7 @@ class Controller extends \yii\base\Controller
 
 		$args = isset($params[Request::ANONYMOUS_PARAMS]) ? $params[Request::ANONYMOUS_PARAMS] : array();
 		unset($params[Request::ANONYMOUS_PARAMS]);
-		if ($params !== array()) {
+		if (!empty($params)) {
 			throw new Exception(Yii::t('yii|Unknown options: {params}', array(
 				'{params}' => implode(', ', array_keys($params)),
 			)));
@@ -105,7 +105,7 @@ class Controller extends \yii\base\Controller
 			}
 		}
 
-		if ($missing !== array()) {
+		if (!empty($missing)) {
 			throw new Exception(Yii::t('yii|Missing required arguments: {params}', array(
 				'{params}' => implode(', ', $missing),
 			)));

framework/console/controllers/HelpController.php

@@ -142,7 +142,7 @@ class HelpController extends Controller
 	protected function getHelp()
 	{
 		$commands = $this->getCommands();
-		if ($commands !== array()) {
+		if (!empty($commands)) {
 			echo "The following commands are available:\n\n";
 			foreach ($commands as $command) {
 				echo "* $command\n";
@@ -172,7 +172,7 @@ class HelpController extends Controller
 		}
 
 		$actions = $this->getActions($controller);
-		if ($actions !== array()) {
+		if (!empty($actions)) {
 			echo "\nSUB-COMMANDS\n\n";
 			$prefix = $controller->getUniqueId();
 			foreach ($actions as $action) {
@@ -280,7 +280,7 @@ class HelpController extends Controller
 		}
 
 		$options = $this->getOptionHelps($controller);
-		if ($options !== array()) {
+		if (!empty($options)) {
 			echo "\nOPTIONS\n\n";
 			echo implode("\n\n", $options) . "\n\n";
 		}

framework/console/controllers/MigrateController.php

@@ -144,7 +144,8 @@ class MigrateController extends Controller
 	 */
 	public function actionUp($limit = 0)
 	{
-		if (($migrations = $this->getNewMigrations()) === array()) {
+		$migrations = $this->getNewMigrations();
+		if (empty($migrations)) {
 			echo "No new migration found. Your system is up-to-date.\n";
 			Yii::$app->end();
 		}
@@ -198,7 +199,8 @@ class MigrateController extends Controller
 			throw new Exception("The step argument must be greater than 0.");
 		}
 
-		if (($migrations = $this->getMigrationHistory($limit)) === array()) {
+		$migrations = $this->getMigrationHistory($limit);
+		if (empty($migrations)) {
 			echo "No migration has been done before.\n";
 			return;
 		}
@@ -244,7 +246,8 @@ class MigrateController extends Controller
 			throw new Exception("The step argument must be greater than 0.");
 		}
 
-		if (($migrations = $this->getMigrationHistory($limit)) === array()) {
+		$migrations = $this->getMigrationHistory($limit);
+		if (empty($migrations)) {
 			echo "No migration has been done before.\n";
 			return;
 		}
@@ -407,7 +410,7 @@ class MigrateController extends Controller
 	{
 		$limit = (int)$limit;
 		$migrations = $this->getMigrationHistory($limit);
-		if ($migrations === array()) {
+		if (empty($migrations)) {
 			echo "No migration has been done before.\n";
 		} else {
 			$n = count($migrations);
@@ -441,7 +444,7 @@ class MigrateController extends Controller
 	{
 		$limit = (int)$limit;
 		$migrations = $this->getNewMigrations();
-		if ($migrations === array()) {
+		if (empty($migrations)) {
 			echo "No new migrations found. Your system is up-to-date.\n";
 		} else {
 			$n = count($migrations);

framework/db/ActiveQuery.php

@@ -103,7 +103,7 @@ class ActiveQuery extends Query
 	{
 		$command = $this->createCommand();
 		$rows = $command->queryAll();
-		if ($rows !== array()) {
+		if (!empty($rows)) {
 			$models = $this->createModels($rows);
 			if (!empty($this->with)) {
 				$this->populateRelations($models, $this->with);

framework/db/Command.php

@@ -106,7 +106,7 @@ class Command extends \yii\base\Component
 	 */
 	public function getRawSql()
 	{
-		if ($this->_params === array()) {
+		if (empty($this->_params)) {
 			return $this->_sql;
 		} else {
 			$params = array();

framework/db/Query.php

@@ -589,7 +589,7 @@ class Query extends \yii\base\Component
 	 */
 	public function addParams($params)
 	{
-		if ($params !== array()) {
+		if (!empty($params)) {
 			if ($this->params === null) {
 				$this->params = $params;
 			} else {

framework/db/QueryBuilder.php

@@ -722,7 +722,7 @@ class QueryBuilder extends \yii\base\Object
 
 		if (!is_array($condition)) {
 			return (string)$condition;
-		} elseif ($condition === array()) {
+		} elseif (empty($condition)) {
 			return '';
 		}
 		if (isset($condition[0])) { // operator format: operator, operand 1, operand 2, ...
@@ -777,7 +777,7 @@ class QueryBuilder extends \yii\base\Object
 				$parts[] = $operand;
 			}
 		}
-		if ($parts !== array()) {
+		if (!empty($parts)) {
 			return '(' . implode(") $operator (", $parts) . ')';
 		} else {
 			return '';
@@ -813,7 +813,7 @@ class QueryBuilder extends \yii\base\Object
 
 		$values = (array)$values;
 
-		if ($values === array() || $column === array()) {
+		if (empty($values) || $column === array()) {
 			return $operator === 'IN' ? '0=1' : '';
 		}
 
@@ -885,7 +885,7 @@ class QueryBuilder extends \yii\base\Object
 
 		$values = (array)$values;
 
-		if ($values === array()) {
+		if (empty($values)) {
 			return $operator === 'LIKE' || $operator === 'OR LIKE' ? '0=1' : '';
 		}
 

framework/helpers/base/ArrayHelper.php

@@ -36,7 +36,7 @@ class ArrayHelper
 	{
 		$args = func_get_args();
 		$res = array_shift($args);
-		while ($args !== array()) {
+		while (!empty($args)) {
 			$next = array_shift($args);
 			foreach ($next as $k => $v) {
 				if (is_integer($k)) {

framework/helpers/base/Html.php

@@ -324,7 +324,7 @@ class Html
 		$options['action'] = $action;
 		$options['method'] = $method;
 		$form = static::beginTag('form', $options);
-		if ($hiddenInputs !== array()) {
+		if (!empty($hiddenInputs)) {
 			$form .= "\n" . implode("\n", $hiddenInputs);
 		}
 
@@ -618,7 +618,7 @@ class Html
 	 *   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 
+	 * 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
@@ -647,7 +647,7 @@ class Html
 	 *   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 
+	 * 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
@@ -694,9 +694,9 @@ class Html
 	 * - 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 $items.
 	 *
-	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
+	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
-	 * 
+	 *
 	 * @return string the generated drop-down list tag
 	 */
 	public static function dropDownList($name, $selection = null, $items = array(), $options = array())
@@ -737,9 +737,9 @@ class Html
 	 *   When this attribute is set, a hidden field will be generated so that if no option is selected in multiple
 	 *   mode, we can still obtain the posted unselect value.
 	 *
-	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will 
+	 * The rest of the options will be rendered as the attributes of the resulting tag. The values will
 	 * be HTML-encoded using [[encode()]]. If a value is null, the corresponding attribute will not be rendered.
-	 * 
+	 *
 	 * @return string the generated list box tag
 	 */
 	public static function listBox($name, $selection = null, $items = array(), $options = array())

framework/helpers/base/Json.php

@@ -34,7 +34,7 @@ class Json
 		$expressions = array();
 		$value = static::processData($value, $expressions);
 		$json = json_encode($value, $options);
-		return $expressions === array() ? $json : strtr($json, $expressions);
+		return empty($expressions) ? $json : strtr($json, $expressions);
 	}
 
 	/**

framework/i18n/I18N.php

@@ -109,7 +109,7 @@ class I18N extends Component
 			unset($params[0]);
 		}
 
-		return $params === array() ? $message : strtr($message, $params);
+		return empty($params) ? $message : strtr($message, $params);
 	}
 
 	/**

framework/validators/FileValidator.php

@@ -116,7 +116,7 @@ class FileValidator extends Validator
 		}
 		if (!is_array($this->types)) {
 			$this->types = preg_split('/[\s,]+/', strtolower($this->types), -1, PREG_SPLIT_NO_EMPTY);
-		}		
+		}
 	}
 
 	/**
@@ -138,8 +138,8 @@ class FileValidator extends Validator
 				}
 			}
 			$object->$attribute = array_values($files);
-			if ($files === array()) {
-				$this->addError($object, $attribute, $this->uploadRequired);				
+			if (empty($files)) {
+				$this->addError($object, $attribute, $this->uploadRequired);
 			}
 			if (count($files) > $this->maxFiles) {
 				$this->addError($object, $attribute, $this->tooMany, array('{attribute}' => $attribute, '{limit}' => $this->maxFiles));
@@ -153,7 +153,7 @@ class FileValidator extends Validator
 			if ($file instanceof UploadedFile && $file->getError() != UPLOAD_ERR_NO_FILE) {
 				$this->validateFile($object, $attribute, $file);
 			} else {
-				$this->addError($object, $attribute, $this->uploadRequired);				
+				$this->addError($object, $attribute, $this->uploadRequired);
 			}
 		}
 	}

framework/web/Sort.php

@@ -251,7 +251,7 @@ class Sort extends \yii\base\Object
 					}
 				}
 			}
-			if ($this->_attributeOrders === array() && is_array($this->defaults)) {
+			if (empty($this->_attributeOrders) && is_array($this->defaults)) {
 				$this->_attributeOrders = $this->defaults;
 			}
 		}

framework/web/UrlManager.php

@@ -90,7 +90,7 @@ class UrlManager extends Component
 	 */
 	protected function compileRules()
 	{
-		if (!$this->enablePrettyUrl || $this->rules === array()) {
+		if (!$this->enablePrettyUrl || empty($this->rules)) {
 			return;
 		}
 		if (is_string($this->cache)) {
@@ -190,13 +190,13 @@ class UrlManager extends Component
 			if ($this->suffix !== null) {
 				$route .= $this->suffix;
 			}
-			if ($params !== array()) {
+			if (!empty($params)) {
 				$route .= '?' . http_build_query($params);
 			}
 			return rtrim($baseUrl, '/') . '/' . $route . $anchor;
 		} else {
 			$url = $baseUrl . '?' . $this->routeVar . '=' . $route;
-			if ($params !== array()) {
+			if (!empty($params)) {
 				$url .= '&' . http_build_query($params);
 			}
 			return $url;

framework/web/UrlRule.php

@@ -144,7 +144,7 @@ class UrlRule extends Object
 		$this->_template = preg_replace('/<(\w+):?([^>]+)?>/', '<$1>', $this->pattern);
 		$this->pattern = '#^' . trim(strtr($this->_template, $tr), '/') . '$#u';
 
-		if ($this->_routeParams !== array()) {
+		if (!empty($this->_routeParams)) {
 			$this->_routeRule = '#^' . strtr($this->route, $tr2) . '$#u';
 		}
 	}
@@ -275,7 +275,7 @@ class UrlRule extends Object
 			$url .= ($this->suffix === null ? $manager->suffix : $this->suffix);
 		}
 
-		if ($params !== array()) {
+		if (!empty($params)) {
 			$url .= '?' . http_build_query($params);
 		}
 		return $url;

framework/widgets/ActiveField.php

@@ -104,7 +104,7 @@ class ActiveField extends Component
 	public function begin()
 	{
 		$options = $this->getClientOptions();
-		if ($options !== array()) {
+		if (!empty($options)) {
 			$this->form->attributes[$this->attribute] = $options;
 		}
 
@@ -123,7 +123,7 @@ class ActiveField extends Component
 
 		return Html::beginTag($this->tag, $options);
 	}
-	
+
 	public function end()
 	{
 		return Html::endTag($this->tag);
@@ -143,7 +143,7 @@ class ActiveField extends Component
 					$validators[] = $js;
 				}
 			}
-			if ($validators !== array()) {
+			if (!empty($validators)) {
 				$options['validate'] = new JsExpression("function(attribute,value,messages){" . implode('', $validators) . '}');
 			}
 		}

framework/widgets/ActiveForm.php

@@ -130,7 +130,7 @@ class ActiveForm extends Widget
 	 */
 	public function run()
 	{
-		if ($this->attributes !== array()) {
+		if (!empty($this->attributes)) {
 			$id = $this->options['id'];
 			$options = Json::encode($this->getClientOptions());
 			$attributes = Json::encode($this->attributes);
@@ -197,7 +197,7 @@ class ActiveForm extends Widget
 			$options['class'] .= ' ' . $this->errorSummaryCssClass;
 		}
 
-		if ($lines !== array()) {
+		if (!empty($lines)) {
 			$content = "<ul><li>" . implode("</li>\n<li>", $lines) . "</li><ul>";
 			return Html::tag('div', $header . $content . $footer, $options);
 		} else {

framework/widgets/FragmentCache.php

@@ -107,7 +107,7 @@ class FragmentCache extends Widget
 			$data = array($content, $this->dynamicPlaceholders);
 			$this->cache->set($this->calculateKey(), $data, $this->duration, $this->dependency);
 
-			if ($this->view->cacheStack === array() && !empty($this->dynamicPlaceholders)) {
+			if (empty($this->view->cacheStack) && !empty($this->dynamicPlaceholders)) {
 				$content = $this->updateDynamicContent($content, $this->dynamicPlaceholders);
 			}
 			echo $content;
@@ -133,7 +133,7 @@ class FragmentCache extends Widget
 				if (is_array($data) && count($data) === 2) {
 					list ($content, $placeholders) = $data;
 					if (is_array($placeholders) && count($placeholders) > 0) {
-						if ($this->view->cacheStack === array()) {
+						if (empty($this->view->cacheStack)) {
 							// outermost cache: replace placeholder with dynamic content
 							$content = $this->updateDynamicContent($content, $placeholders);
 						}
@@ -171,4 +171,4 @@ class FragmentCache extends Widget
 		}
 		return $this->cache->buildKey($factors);
 	}
-}
+}

framework/widgets/Menu.php

@@ -166,7 +166,7 @@ class Menu extends Widget
 			if ($this->itemCssClass !== null) {
 				$class[] = $this->itemCssClass;
 			}
-			if ($class !== array()) {
+			if (!empty($class)) {
 				if (empty($options['class'])) {
 					$options['class'] = implode(' ', $class);
 				} else {