run code in 200+ PHP versions simultaneously
<?php class ParentClassBackCompat { public function walk($param1, $param2) {} } class ChildClassBackCompat extends ParentClassBackCompat { function walk($param1, $param2, ...$spread) {} }
based on 5oNs4

Shows result from various feature-branches currently under review from the php developers. Contact me to have additional branches featured.

Output for branch php-master
Output for branch php-master+opcache
Output for branch php-master+jit

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page