run code in 200+ php & hhvm versions
<?php function foo(): ?array { return array(); } function bar(): ?array { return null; } foo(); bar();

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+opcache
Output for branch php-master+jit
Output for branch php-master
Output for Typed properties v2
Output for Arrow functions
Output for Object typehint
Output for Array change keys
Output for Lexical anon
Parse error: syntax error, unexpected '?' in /in/YiD0p on line 3
Process exited with code 255.

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