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<?php class A { public function printMe() { print get_class($this).PHP_EOL; } } class AB extends A { } class App { public function run(A $a) { $a->printMe(); } } class MyApp extends App { public function run(AB $ab) { parent::run($ab); } } $ab = new AB(); $app = new MyApp(); $app->run($ab);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of MyApp::run(AB $ab) must be compatible with App::run(A $a) in /in/cl3o5 on line 20
Process exited with code 255.

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