Online PHP editor | output for 9GIpP

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /in/9GIpP:5 Stack trace: #0 /in/9GIpP(5): array_keys(NULL) #1 /in/9GIpP(8): isIndexedArray(NULL) #2 {main} thrown in /in/9GIpP on line 5
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, null given in /in/9GIpP:5 Stack trace: #0 /in/9GIpP(5): array_keys(NULL) #1 /in/9GIpP(8): isIndexedArray(NULL) #2 {main} thrown in /in/9GIpP on line 5
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Warning: array_keys() expects parameter 1 to be array, null given in /in/9GIpP on line 5 Warning: array_filter() expects parameter 1 to be array, null given in /in/9GIpP on line 5 Warning: count(): Parameter must be an array or an object that implements Countable in /in/9GIpP on line 5
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33: Warning: array_keys() expects parameter 1 to be array, null given in /in/9GIpP on line 5 Warning: array_filter() expects parameter 1 to be array, null given in /in/9GIpP on line 5