Online PHP editor | refs for 40HHi

<?php $string = 'a{ra:calc(*(la)100%);font-s'; $string_regex = '((?<!\\\\)(?:\\\\\\\\)*(\'|")(?:.*?[^\\\\])??(?:\\\\\\\\)*\\2)'; $comment_regex = '(\\/\\*(?:(?!\\*\\/).)*\\*\\/)'; $url_regex = '(?<=:| |,|\$|\$)(url|calc)\\s*(\$)\\s*((?:[^()]+|(?2))*?)\\s*(\$)'; $string = preg_match('/'.$string_regex.'|'.$comment_regex.'|'.$url_regex.'|'.$calc_regex.'/si', $string, $matches);