3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $f; if (isset($f)){ echo 9; }
Output for 5.1.0 - 5.6.28, 7.0.0 - 7.1.0
Output for 5.0.4 - 5.0.5, hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: f in /in/RXBYb on line 2
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: f in /in/RXBYb on line 2