run code in 200+ PHP versions simultaneously
<?php function foo(): int { return 1; } foo();

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
Output for branch php-master+opcache
Output for branch php-master+jit
Output for Typed properties v2
Output for Arrow functions
Output for Object typehint
Output for Array change keys
Output for Lexical anon
Catchable fatal error: Return value of foo() must be an instance of int, integer returned in /in/IupnQ on line 5
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