3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); class A {} class B extends A {} class C extends B {} interface InterfaceTest { public function foo(): B; } abstract class AbstractTest { public abstract function foo(): B; } class TestInterfaceContravariance implements InterfaceTest { public function foo(): A {} } class TestInterfaceCovariance implements InterfaceTest { public function foo(): C {} }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of TestInterfaceContravariance::foo(): A must be compatible with InterfaceTest::foo(): B in /in/pqI2n on line 16
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:
48.2 ms | 401 KiB | 8 Q