3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('^[^\d]','', '3023');
Output for 4.3.11 - 7.1.0
Warning: preg_replace(): Unknown modifier '\' in /in/TCQ9W on line 2
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '\' in /in/TCQ9W on line 2