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<?php class A {} class B extends A {} class C extends B {} interface InterfaceTest { public function foo(B $p); } abstract class AbstractTest { public abstract function foo(B $p); } // class TestAbstractContravariance extends AbstractTest { // public function foo(A $p) {} // } //class TestAbstractCovariance extends AbstractTest { // public function foo(C $p) {} //} class TestInterfaceContravariance implements InterfaceTest { public function foo(A $p) {} } class TestInterfaceCovariance implements InterfaceTest { public function foo(C $p) {} }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of TestInterfaceCovariance::foo(C $p) must be compatible with InterfaceTest::foo(B $p) in /in/21fYt on line 23
Process exited with code 255.

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