3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = []; echo isset($array[$x]) ? $array[$x] : 'default';
based on S5vWj
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.21.3, 7.0.0 - 7.3.0beta1
Notice: Undefined variable: x in /in/aPk2S on line 3 default
Output for hhvm-3.22.0
Notice: Undefined variable: x in /in/aPk2S on line -1 default