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 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
joel912oihjasis_cool