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<?php class A {} class B extends A {} class Handler { public function handle(A $a) {} } class HandlerB extends Handler { public function handle(B $a) {} } $handlerA = new Handler(); $handlerB = new HandlerB(); $handlerA->handle(new A()); $handlerB->handle(new B());
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of HandlerB::handle(B $a) must be compatible with Handler::handle(A $a) in /in/i6uXQ on line 12
Process exited with code 255.

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