3v4l.org

run code in 300+ PHP versions simultaneously
<?php if (preg_match('/\bABČĎ\b/ui', 'ABČĎ')) echo 'OK'; else echo 'KO'; if (preg_match('/ABČĎ/ui', 'ABČĎ')) echo 'OK'; else echo 'KO';

preferences:
45.54 ms | 402 KiB | 5 Q