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<?php function foo($x) { var_dump($x); var_dump($x()); return $x === $x(); } var_dump(foo(call_user_func(function(){})));
Output for git.master, git.master_jit, rfc.property-hooks
NULL Fatal error: Uncaught Error: Value of type null is not callable in /in/e2Yeq:6 Stack trace: #0 /in/e2Yeq(10): foo(NULL) #1 {main} thrown in /in/e2Yeq on line 6
Process exited with code 255.

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