3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/(?![0-9]))/i', '', 'CAB123')?>
based on OKaRQ
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Compilation failed: unmatched parentheses at offset 9 in /in/JJ6lD on line 2
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unmatched parentheses at offset 9 in /in/JJ6lD on line 2