3v4l.org

run code in 200+ PHP versions simultaneously
<?php $lost = array("A","B","C","D"); // $list = $lost; # cow-count2 // $list = &$lost; # refcount2 $list = $lost; unset($lost); # just like just assigned but assigned and unset original. foreach ( $list as $var ) { printf("%s (%s)\n", item($list), $var); } function item(&$list) { return current($list); } ?>

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
A (A) A (B) A (C) A (D)
Output for branch php-master+opcache
A (A) A (B) A (C) A (D)

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