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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
* @param int $limit the maximum number of replacements
*
* @return string
*/
function smarty_modifier_regex_replace($string, $search, $replace, $limit = -1)
{
if (is_array($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, $limit);
}
/**
* @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;
}
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