3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match( '/^\[#(\d+)\]/', 'C:\wamp\www\learnsmart\trunk/wp-content/themes/smartworld/tpl.home.php', $matches); echo $matches[1]; // 1234
based on PWmNb
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined offset: 1 in /in/1tXiK on line 3
Output for hhvm-3.12.0
Notice: Undefined index: 1 in /in/1tXiK on line 3
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.2.17
Notice: Undefined offset: 1 in /in/1tXiK on line 3
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/1tXiK on line 3
Process exited with code 255.