3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $zizzle = INF; if ($zizzle !== $zizzle) { echo 'wow'; }
based on iCSMO
Output for 4.3.6 - 7.2.0
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant INF - assumed 'INF' in /in/ACb8v on line 4