3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f($req, $opt = null) { echo $req+$req*$req; } f(1); f(1, 2); f(1, 2, 3); f(1, 2, 3, 4); f(1, 2, 3, 4, 5); ?>
Output for 4.3.0 - 7.1.0
22222