* * @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; }