3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(E_ALL); $undefinedVariable = null; var_export($undefinedVariable['undefinedKey']['undefinedKey2']);
based on e4MMC
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
NULL