Online PHP editor | output for WMIv4

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: Warning: Undefined variable $recipients in /in/WMIv4 on line 4 Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array, null given in /in/WMIv4:4 Stack trace: #0 /in/WMIv4(4): array_map('trim', NULL) #1 {main} thrown in /in/WMIv4 on line 4
Process exited with code 255.
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined variable: recipients in /in/WMIv4 on line 4 Warning: array_map(): Expected parameter 2 to be an array, null given in /in/WMIv4 on line 4 Warning: array_filter() expects parameter 1 to be array, null given in /in/WMIv4 on line 4 NULL
Output for 7.3.32 - 7.3.33: Warning: array_map(): Expected parameter 2 to be an array, null given in /in/WMIv4 on line 4 Warning: array_filter() expects parameter 1 to be array, null given in /in/WMIv4 on line 4 NULL
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: Notice: Undefined variable: recipients in /in/WMIv4 on line 4 Warning: array_map(): Argument #2 should be an array in /in/WMIv4 on line 4 Warning: array_filter() expects parameter 1 to be array, null given in /in/WMIv4 on line 4 NULL
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Notice: Undefined variable: recipients in /in/WMIv4 on line 4 Warning: array_map(): Argument #2 should be an array in /in/WMIv4 on line 4 Warning: array_filter(): The first argument should be an array in /in/WMIv4 on line 4 NULL
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3: Notice: Undefined variable: recipients in /in/WMIv4 on line 4 Warning: array_map(): Argument #2 should be an array in /in/WMIv4 on line 4 Warning: array_filter(): The first argument should be an array in /in/WMIv4 on line 4 NULL
Output for 4.3.0 - 4.3.1: Notice: Undefined variable: recipients in /in/WMIv4 on line 4 Warning: array_map() [http://www.php.net/function.array-map]: Argument #2 should be an array in /in/WMIv4 on line 4 Warning: array_filter() [http://www.php.net/function.array-filter]: The first argument should be an array in /in/WMIv4 on line 4 NULL