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

/**
* Smarty regex_replace modifier plugin
* 
* Type:     modifier<br>
* Name:     regex_replace<br>
* Purpose:  regular expression search/replace
* 
* @link http://smarty.php.net/manual/en/language.modifier.regex.replace.php regex_replace (Smarty online manual)
* @author Monte Ohrt <monte at ohrt dot com> 
* @param string $ 
* @param string $ |array
* @param string $ |array
* @return string 
*/
function smarty_modifier_regex_replace($string, $search, $replace)
{
    $smarty = Smarty::instance();

    if (is_array($search)) {
        foreach($search as $idx => $s)
        $search[$idx] = _smarty_regex_replace_check($s);
    } else {
        $search = _smarty_regex_replace_check($search);
    } 

    if ($smarty->has_mb) {
        return mb_ereg_replace($search, $replace, $string);
    } else {
        return preg_replace($search, $replace, $string);
    } 
} 

function _smarty_regex_replace_check($search)
{
    if ($smarty->has_mb) {
        if (($pos = mb_strpos($search, "\0")) !== false)
            $search = mb_substr($search, 0, $pos);
        if (mb_preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (mb_strpos($match[1], 'e') !== false)) {
            /* remove eval-modifier from $search */
            $search = mb_substr($search, 0, - mb_strlen($match[1])) . mb_ereg_replace('![e\s]+!', '', $match[1]);
        } 
    } else {
        if (($pos = strpos($search, "\0")) !== false)
            $search = substr($search, 0, $pos);
        if (mb_preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (strpos($match[1], 'e') !== false)) {
            /* remove eval-modifier from $search */
            $search = substr($search, 0, - strlen($match[1])) . preg_replace('![e\s]+!', '', $match[1]);
        } 
    } 
    return $search;
} 

?>