View file smarty/plugins/modifier.replace.php

<?php
/**
* Smarty plugin
* 
* @package Smarty
* @subpackage PluginsModifier
*/

/**
* Smarty replace modifier plugin
* 
* Type:     modifier<br>
* Name:     replace<br>
* Purpose:  simple search/replace
* 
* @link http://smarty.php.net/manual/en/language.modifier.replace.php replace (Smarty online manual)
* @author Monte Ohrt <monte at ohrt dot com> 
* @author Uwe Tews 
* @param string $ 
* @param string $ 
* @param string $ 
* @return string 
*/
function smarty_modifier_replace($string, $search, $replace)
{
    if (!function_exists("mb_str_replace")) {
        // simulate the missing PHP mb_str_replace function
        function mb_str_replace($needle, $replacement, $haystack)
        {
            $needle_len = mb_strlen($needle);
            $replacement_len = mb_strlen($replacement);
            $pos = mb_strpos($haystack, $needle, 0);
            while ($pos !== false) {
                $haystack = mb_substr($haystack, 0, $pos) . $replacement
                 . mb_substr($haystack, $pos + $needle_len);
                $pos = mb_strpos($haystack, $needle, $pos + $replacement_len);
            } 
            return $haystack;
        } 
    } 
    if (function_exists('mb_substr')) {
        return mb_str_replace($search, $replace, $string);
    } else {
        return str_replace($search, $replace, $string);
    } 
} 

?>