modifier.regex_replace.php
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modifier.regex_replace.php
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	<?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 $string input string
	* @param string\|array $search regular expression(s) to search for
	* @param string\|array $replace string(s) that should be replaced
	* @return string
	*/
	function smarty_modifier_regex_replace($string, $search, $replace)
	{
	if(is_array($search)) {
	foreach($search as $idx => $s) {
	$search[$idx] = _smarty_regex_replace_check($s);
	}
	} else {
	$search = _smarty_regex_replace_check($search);
	}
	return preg_replace($search, $replace, $string);
	}

	/**
	* @param string $search string(s) that should be replaced
	* @return string
	* @ignore
	*/
	function _smarty_regex_replace_check($search)
	{
	// null-byte injection detection
	// anything behind the first null-byte is ignored
	if (($pos = strpos($search,"\0")) !== false) {
	$search = substr($search,0,$pos);
	}
	// remove eval-modifier from $search
	if (preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (strpos($match[1], 'e') !== false)) {
	$search = substr($search, 0, -strlen($match[1])) . preg_replace('![e\s]+!', '', $match[1]);
	}
	return $search;
	}

	?>