3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1, 2, 3, 4]; foreach($a as &$v) if($v == 3) unset($v); var_dump($a);

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

Output for Typed properties v2
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> &int(4) }
Output for Array change keys
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> &int(4) }
Output for Lexical anon
array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> &int(4) }

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