3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $falsey = false; if ($falsey) { $undefined_var = 'hello'; } if (!$undefined_var) { $undefined_var = 'world'; }
based on W8u0o
Output for 5.0.4 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: undefined_var in /in/6pu8c on line 6
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: undefined_var in /in/6pu8c on line 6