3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo = 'bar'; var_dump($FOO);
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: FOO in /in/RKa7B on line 5 NULL
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: FOO in /in/RKa7B on line 5 NULL