3v4l.org

run code in 300+ PHP versions simultaneously
<?php define("foo", "bar"); echo foo; echo "\n"; define("TRUE", false); if (TRUE) { echo "TRUE"; } else { echo "FALSE"; }

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

Output for branch master
bar Notice: Constant TRUE already defined in /in/DuVLh on line 8 TRUE

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