run code in 200+ PHP versions simultaneously
<?php $argv[1] = "PDO,FETCH_CLASSTYPE"; ?> <?=constant(explode(',',$argv[1])[0]."::".explode(',',$argv[1])[1])==262144?"Hello, world ":a;

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
Hello, world
Output for branch php-master+opcache
Hello, world
Output for branch php-master+jit
Hello, world

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