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<?php $data = array('key' => null); var_dump(isset($data['key'])); var_dump(array_key_exists($data['key'])); var_dump(isset($data['key']) && $data['key']);
Output for git.master, git.master_jit, rfc.property-hooks
bool(false) Fatal error: Uncaught ArgumentCountError: array_key_exists() expects exactly 2 arguments, 1 given in /in/qT3vQ:5 Stack trace: #0 /in/qT3vQ(5): array_key_exists(NULL) #1 {main} thrown in /in/qT3vQ on line 5
Process exited with code 255.

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