3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function f($req, $opt = null, $params) { printf('$req: %d; $opt: %d; number of params: %d'."\n", $req, $opt, count($params)); } f(1, 'aa', 3, 4, 5,6,7,8,9,10,11,12); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
$req: 1; $opt: 0; number of params: 1