3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = 'a{ra:calc(*(la)100%);font-s'; $string_regex = '((?<!\\\\)(?:\\\\\\\\)*(\'|")(?:.*?[^\\\\])??(?:\\\\\\\\)*\\2)'; $comment_regex = '(\\/\\*(?:(?!\\*\\/).)*\\*\\/)'; $url_regex = '(?<=:| |,|\\(|\\))(url)\\s*(\\()\\s*((?:[^()]+|(?2))*?)\\s*(\\))'; $calc_regex = '(?<=:| |,|\\(|\\))(calc)\\s*(\\()\\s*((?:[^()]+|(?2))*?)\\s*(\\))'; $string = preg_match('/'.$string_regex.'|'.$comment_regex.'|'.$url_regex.'|'.$calc_regex.'/si', $string, $matches);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0