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<?php class Foo { public function foo(Bar $bar) { $bar->bar([$this, 'bar']); } protected function bar() { print 'Foobar!'.PHP_EOL; } } class Bar { public function bar(callable $bar) { $bar(); } } $foo = new Foo; $bar = new Bar; $foo->foo($bar);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: Bar::bar(): Argument #1 ($bar) must be of type callable, array given, called in /in/hO6E1 on line 4 and defined in /in/hO6E1:13 Stack trace: #0 /in/hO6E1(4): Bar->bar(Array) #1 /in/hO6E1(21): Foo->foo(Object(Bar)) #2 {main} thrown in /in/hO6E1 on line 13
Process exited with code 255.

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