3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match('/^\/validation\/(?P<user_name>\.*)?\/(?P<user_key>\.*)?\/$/', "/validation/a%a/1/",$matches); print_r($matches); echo "\n";
Output for 4.3.0 - 7.1.0
Array ( )