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<?php function myFunction($key){ return array_key_exists($key, $array); } array_walk_recursive($keys, 'myFunction');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: array_walk_recursive(): Argument #1 ($array) must be of type array, null given in /in/68e3X:7 Stack trace: #0 /in/68e3X(7): array_walk_recursive(NULL, 'myFunction') #1 {main} thrown in /in/68e3X on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: array_walk_recursive() expects parameter 1 to be array, null given in /in/68e3X on line 7
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: array_walk_recursive(): The argument should be an array in /in/68e3X on line 7
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: array_walk_recursive() in /in/68e3X on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4
Fatal error: Call to undefined function: array_walk_recursive() in /in/68e3X on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: array_walk_recursive() in /in/68e3X on line 7

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