3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump($undefined_var); var_dump($undefined_var === null);
Output for 5.6.0 - 5.6.38, hhvm-3.12.14 - 3.17.3, 7.0.0 - 7.3.1
Notice: Undefined variable: undefined_var in /in/sp9a4 on line 3 NULL Notice: Undefined variable: undefined_var in /in/sp9a4 on line 4 bool(true)