3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php preg_match( '/^[archiv32-]/', 'archiv32-gtl.proe.biz', $matches); echo $matches[1];
Output for 5.3.0 - 7.2.0
Notice: Undefined offset: 1 in /in/Tt2qi on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined offset: 1 in /in/Tt2qi on line 3