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<?php $a = ['a', 'b']; var_dump(count($a['c'])); var_dump(empty($a['c'])); var_dump(isset($a['c']));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "c" in /in/6lKFn on line 4 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/6lKFn:4 Stack trace: #0 {main} thrown in /in/6lKFn on line 4
Process exited with code 255.

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