3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array(); var_dump(null === $a['s']);
based on kgFsa
Output for 5.3.0 - 7.2.0
Notice: Undefined index: s in /in/n15La on line 3 bool(true)
Output for 4.3.0 - 5.2.17
Notice: Undefined index: s in /in/n15La on line 3 bool(true)