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<?php class B {} $a = new stdClass; $b = new B; $b->a = 1; $item='null'; var_dump(array_key_exists($item, $a), array_key_exists('a', $a), array_key_exists('a', $b));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Creation of dynamic property B::$a is deprecated in /in/4qM7j on line 5 Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, stdClass given in /in/4qM7j:7 Stack trace: #0 {main} thrown in /in/4qM7j on line 7
Process exited with code 255.

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