3v4l.org

run code in 200+ 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 - 7.2.0
Notice: Undefined variable: undefined_var in /in/6pu8c on line 6
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: undefined_var in /in/6pu8c on line 6