3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo is_numeric(NAN);
Output for 4.3.6 - 7.2.0
1
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/34l73 on line 3