3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php if (is_array($x)) { echo 'ok'; } else { echo 'nok'; }
Output for 5.0.4 - 7.1.10
Notice: Undefined variable: x in /in/BrmrL on line 4 nok
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: x in /in/BrmrL on line 4 nok