3v4l.org

run code in 300+ PHP versions simultaneously
<?php function event($n, $h = null) { static $e = []; return $h ? $e[$n][] = $h : (isset($e[$n]) ? array_walk($e[$n], function($e) {$e();}) : 0); } event('hello', function () { echo 'hello!'; }); echo event('hello') ? 'true!' : 'false!'; echo event('world') ? 'true!' : 'false!';
Output for git.master, git.master_jit, rfc.property-hooks
hello!true!false!

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

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

preferences:
58.76 ms | 401 KiB | 8 Q