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<?php $x = ['a'=>333, 'b'=>222]; $y = array_key_exists($x, 'a');
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, string given in /in/o3XBV:3 Stack trace: #0 {main} thrown in /in/o3XBV on line 3
Process exited with code 255.

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