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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\helpers;
use yii\base\InvalidParamException;
/**
* StringHelperBase provides concrete implementation for [[StringHelper]].
*
* Do not use StringHelperBase. Use [[StringHelper]] instead.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @author Alex Makarov <sam@rmcreative.ru>
* @since 2.0
*/
class StringHelperBase
{
/**
* Returns the number of bytes in the given string.
* This method ensures the string is treated as a byte array by using `mb_strlen()`.
* @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 mb_strlen($string, '8bit');
}
/**
* Returns the portion of string specified by the start and length parameters.
* This method ensures the string is treated as a byte array by using `mb_substr()`.
* @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, $length)
{
return mb_substr($string, $start, $length, '8bit');
}
/**
* Returns the trailing name component of a path.
* This method is similar to the php function `basename()` except that it will
* treat both \ and / as directory separators, independent of the operating system.
* This method was mainly created to work on php namespaces. When working with real
* file paths, php's `basename()` should work fine for you.
* Note: this method is not aware of the actual filesystem, or path components such as "..".
* @param string $path A path string.
* @param string $suffix If the name component ends in suffix this will also be cut off.
* @return string the trailing name component of the given path.
* @see http://www.php.net/manual/en/function.basename.php
*/
public static function basename($path, $suffix = '')
{
if (($len = mb_strlen($suffix)) > 0 && mb_substr($path, -$len) == $suffix) {
$path = mb_substr($path, 0, -$len);
}
$path = rtrim(str_replace('\\', '/', $path), '/\\');
if (($pos = mb_strrpos($path, '/')) !== false) {
return mb_substr($path, $pos + 1);
}
return $path;
}
/**
* Returns parent directory's path.
* This method is similar to `dirname()` except that it will treat
* both \ and / as directory separators, independent of the operating system.
* @param string $path A path string.
* @return string the parent directory's path.
* @see http://www.php.net/manual/en/function.basename.php
*/
public static function dirname($path)
{
$pos = mb_strrpos(str_replace('\\', '/', $path), '/');
if ($pos !== false) {
return mb_substr($path, 0, $pos);
} else {
return $path;
}
}
/**
* Compares two strings or string arrays, and return their differences.
* This is a wrapper of the [phpspec/php-diff](https://packagist.org/packages/phpspec/php-diff) package.
* @param string|array $lines1 the first string or string array to be compared. If it is a string,
* it will be converted into a string array by breaking at newlines.
* @param string|array $lines2 the second string or string array to be compared. If it is a string,
* it will be converted into a string array by breaking at newlines.
* @param string $format the output format. It must be 'inline', 'unified', 'context', 'side-by-side', or 'array'.
* @return string|array the comparison result. An array is returned if `$format` is 'array'. For all other
* formats, a string is returned.
* @throws InvalidParamException if the format is invalid.
*/
public static function diff($lines1, $lines2, $format = 'inline')
{
if (!is_array($lines1)) {
$lines1 = explode("\n", $lines1);
}
if (!is_array($lines2)) {
$lines2 = explode("\n", $lines2);
}
foreach ($lines1 as $i => $line) {
$lines1[$i] = rtrim($line, "\r\n");
}
foreach ($lines2 as $i => $line) {
$lines2[$i] = rtrim($line, "\r\n");
}
switch ($format) {
case 'inline':
$renderer = new \Diff_Renderer_Html_Inline();
break;
case 'array':
$renderer = new \Diff_Renderer_Html_Array();
break;
case 'side-by-side':
$renderer = new \Diff_Renderer_Html_SideBySide();
break;
case 'context':
$renderer = new \Diff_Renderer_Text_Context();
break;
case 'unified':
$renderer = new \Diff_Renderer_Text_Unified();
break;
default:
throw new InvalidParamException("Output format must be 'inline', 'side-by-side', 'array', 'context' or 'unified'.");
}
$diff = new \Diff($lines1, $lines2);
return $diff->render($renderer);
}
}