3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(E_ALL); var_dump($_GET['a']);
based on BBpjO
Output for 5.3.0 - 7.2.0
Notice: Undefined index: a in /in/W7ACu on line 5 NULL
Output for 4.3.0 - 5.2.17
Notice: Undefined index: a in /in/W7ACu on line 5 NULL