3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function derp($derp = 1){ var_dump($derp); } derp(null);
based on 51GO2
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
NULL