3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $zizzle = NAN; if ($zizzle !== $zizzle) { echo 'wow'; }
based on iCSMO
Output for 4.3.6 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
wow
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/kjNKW on line 2