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<?php interface FooInterface { public function dump(self $baz); } class Foo implements FooInterface { public function dump(self $baz) { var_dump($baz); } } class Bar extends Foo { public function dump(Foo $baz) { parent::dump($baz); } } $foo = new Foo; $foo->dump($foo); //(new Bar)->dump(new Bar); //(new Bar)->dump(new Foo);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of Foo::dump(Foo $baz) must be compatible with FooInterface::dump(FooInterface $baz) in /in/vdj5F on line 11
Process exited with code 255.

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