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69 lines
2.4 KiB
69 lines
2.4 KiB
13 years ago
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\helpers\base;
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/**
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* StringHelper
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @author Alex Makarov <sam@rmcreative.ru>
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* @since 2.0
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*/
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class StringHelper
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{
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/**
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* Returns the number of bytes in the given string.
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* This method ensures the string is treated as a byte array.
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* It will use `mb_strlen()` if it is available.
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* @param string $string the string being measured for length
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* @return integer the number of bytes in the given string.
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*/
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public static function strlen($string)
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{
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return function_exists('mb_strlen') ? mb_strlen($string, '8bit') : strlen($string);
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}
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/**
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* Returns the portion of string specified by the start and length parameters.
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* This method ensures the string is treated as a byte array.
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* It will use `mb_substr()` if it is available.
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* @param string $string the input string. Must be one character or longer.
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* @param integer $start the starting position
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* @param integer $length the desired portion length
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* @return string the extracted part of string, or FALSE on failure or an empty string.
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* @see http://www.php.net/manual/en/function.substr.php
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*/
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public static function substr($string, $start, $length)
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{
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return function_exists('mb_substr') ? mb_substr($string, $start, $length, '8bit') : substr($string, $start, $length);
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}
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/**
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13 years ago
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* Returns the trailing name component of a path.
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* This method does the same as the php function basename() except that it will
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* always use \ and / as directory separators, independent of the operating system.
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* Note: basename() operates naively on the input string, and is not aware of the
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* actual filesystem, or path components such as "..".
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* @param string $path A path string.
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* @param string $suffix If the name component ends in suffix this will also be cut off.
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* @return string the trailing name component of the given path.
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* @see http://www.php.net/manual/en/function.basename.php
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*/
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public static function basename($path, $suffix = '')
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{
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if (($len = mb_strlen($suffix)) > 0 && mb_substr($path, -$len) == $suffix) {
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$path = mb_substr($path, 0, -$len);
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}
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$path = rtrim(str_replace('\\', '/', $path), '/\\');
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if (($pos = mb_strrpos($path, '/')) !== false) {
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return mb_substr($path, $pos + 1);
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}
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return $path;
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}
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13 years ago
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}
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