3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $ref = "joel912oihjasis_cool"; $ref = preg_replace("[^a-zA-Z0-9]+", "", $ref); echo $ref;
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Unknown modifier '+' in /in/DVcUg on line 3
Output for hhvm-3.10.0 - 3.12.0
Warning: Unknown modifier '+': [[^a-zA-Z0-9]+] in /in/DVcUg on line 3
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '+' in /in/DVcUg on line 3