3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $ref = "joel912oihjasis_cool"; $ref = preg_replace("[^a-zA-Z0-9]+", "", $ref); echo $ref;
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Unknown modifier '+' in /in/DVcUg on line 3
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '+' in /in/DVcUg on line 3