run code in 200+ php & hhvm versions
<?php for($i=0; $i<256; $i++) echo !ord(chr($i)) == $i;

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

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