3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function f($req, $opt = null) { @printf('$req: %d; $opt: %d; number of params: %d'."\n", $req, $opt); } f(1); f(1, 2); f(1, 2, 3); f(1, 2, 3, 4); f(1, 2, 3, 4, 5); ?>
based on NIfts
Output for 4.3.0 - 7.2.0