3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo NaN;
Output for 7.2.0 - 7.3.1
Warning: Use of undefined constant NaN - assumed 'NaN' (this will throw an Error in a future version of PHP) in /in/JXkYL on line 3 NaN
Output for 4.3.0 - 7.1.25
Notice: Use of undefined constant NaN - assumed 'NaN' in /in/JXkYL on line 3 NaN