3v4l.org

run code in 300+ PHP versions simultaneously
<?php class User {} interface UserGateway { function find($id): User; } class UserGateway_MySql implements UserGateway { // must return User or subtype of User function find($id) { return new User(); } } ?>
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of UserGateway_MySql::find($id) must be compatible with UserGateway::find($id): User in /in/Wu6Fl on line 11
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:
44.93 ms | 401 KiB | 8 Q