3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = array("a" => array("1")); $a2 = array("a" => array()); var_dump(array_merge($a1, $a2)); var_dump(array_merge($a2, $a1));
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["a"]=> array(0) { } } array(1) { ["a"]=> array(1) { [0]=> string(1) "1" } }

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:
59.94 ms | 401 KiB | 8 Q