Online PHP editor | output for PCBg1

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback or null, function "int" not found or invalid function name in /in/PCBg1:5 Stack trace: #0 /in/PCBg1(5): array_map('int', Array) #1 {main} thrown in /in/PCBg1 on line 5
Process exited with code 255.
Output for 8.0.0 - 8.0.30: Fatal error: Uncaught TypeError: array_map(): Argument #1 ($callback) must be a valid callback, function "int" not found or invalid function name in /in/PCBg1:5 Stack trace: #0 /in/PCBg1(5): array_map('int', Array) #1 {main} thrown in /in/PCBg1 on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33: Warning: array_map() expects parameter 1 to be a valid callback, function 'int' not found or invalid function name in /in/PCBg1 on line 5
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: array_map(): The first argument, 'int', should be either NULL or a valid callback in /in/PCBg1 on line 5
Output for 4.3.0 - 4.3.1: Warning: array_map() [http://www.php.net/function.array-map]: The first argument, 'int', should be either NULL or a valid callback in /in/PCBg1 on line 5