3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function a() {}; var_dump(gettype($f));
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: f in /in/OQ2J3 on line 5 string(4) "NULL"
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: f in /in/OQ2J3 on line 5 string(4) "NULL"