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<?php function test($array) { try { return isDictionary($array); } catch (Exception $e) { echo $e->getMessage(); return 'error'; } } function isDictionary($array) { return !(bool)count(array_filter(array_keys($array), 'is_string')); } $arr = null; var_dump(test($arr));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /in/hWHq8:17 Stack trace: #0 /in/hWHq8(17): array_keys(NULL) #1 /in/hWHq8(7): isDictionary(NULL) #2 /in/hWHq8(23): test(NULL) #3 {main} thrown in /in/hWHq8 on line 17
Process exited with code 255.

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