NULL
Fatal error: Uncaught TypeError: array_walk(): Argument #1 ($array) must be of type array, null given in /in/u7WZh:6
Stack trace:
#0 /in/u7WZh(6): array_walk(NULL, Object(Closure))
#1 {main}
thrown in /in/u7WZh on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
NULL
Fatal error: Uncaught TypeError: array_walk(): Argument #1 ($array) must be of type array, null given in /in/u7WZh:8
Stack trace:
#0 /in/u7WZh(8): array_walk(NULL, Object(Closure))
#1 {main}
thrown in /in/u7WZh on line 8
Process exited with code 255.