3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if (preg_match('/AB[Č]Ď/u', 'ABČĎ')) echo 'OK'; else echo 'KO';
Output for 4.3.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
OK
Output for hhvm-3.10.0

Process exited with code 137.
Output for 4.3.0 - 4.3.2
KO