3v4l.org

run code in 500+ PHP versions simultaneously
<?php interface X { public function read($foo): void; } class Y implements X { public function read(string $foo): void { echo $foo; } } (new Y)->read('bar');
Output for rfc.property-hooks, git.master, git.master_jit
Fatal error: Declaration of Y::read(string $foo): void must be compatible with X::read($foo): void in /in/h6Ehe on line 10
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

preferences:
102.08 ms | 1261 KiB | 4 Q