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<?php $someClass = new SomeClass; class SomeClass { public $value; }; var_dump(array_key_exists('value', $someClass)); var_dump(property_exists($someClass, 'value'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, SomeClass given in /in/69mpd:9 Stack trace: #0 {main} thrown in /in/69mpd on line 9
Process exited with code 255.

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