3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php is_numeric(undefined);
Output for 7.2.0
Warning: Use of undefined constant undefined - assumed 'undefined' (this will throw an Error in a future version of PHP) in /in/UUvRd on line 3
Output for 5.3.22 - 7.1.10
Notice: Use of undefined constant undefined - assumed 'undefined' in /in/UUvRd on line 3