run code in 300+ PHP versions simultaneously
<?php function foo(mixed $arg): mixed { echo 'foo'; } foo('arg');
Output for git.master, git.master_jit, rfc.property-hooks
foo Fatal error: Uncaught TypeError: foo(): Return value must be of type mixed, none returned in /in/I5ipI:6 Stack trace: #0 /in/I5ipI(8): foo('arg') #1 {main} thrown in /in/I5ipI on line 6
Process exited with code 255.

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

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

59.71 ms | 402 KiB | 8 Q