3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $undef = $_POST['idontexist']; echo isset($undef);
Output for 5.3.0 - 7.2.0
Notice: Undefined index: idontexist in /in/iHLTN on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: idontexist in /in/iHLTN on line 3