3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $url = 'http://www.google.com'; print_R(preg_match('/?:\/\//', $url, $match)); print_R($match);
based on Q5hvs
Output for 5.2.0 - 7.1.0
Warning: preg_match(): Compilation failed: nothing to repeat at offset 0 in /in/qALoN on line 3
Output for 4.3.11 - 5.1.6
Warning: preg_match(): Compilation failed: nothing to repeat at offset 0 in /in/qALoN on line 3 Array ( )
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: nothing to repeat at offset 0 in /in/qALoN on line 3 Array ( )