Online PHP editor | output for Rb72e

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 - 8.3.7: Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, class "Hello" not found in /in/Rb72e:17 Stack trace: #0 /in/Rb72e(17): call_user_func(Array, 'foobar') #1 {main} thrown in /in/Rb72e on line 17
Process exited with code 255.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, class "Hello" not found in /in/Rb72e:17 Stack trace: #0 /in/Rb72e(17): call_user_func(Array, 'foobar') #1 {main} thrown in /in/Rb72e on line 17
Process exited with code 255.
Output for 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: call_user_func() expects parameter 1 to be a valid callback, class 'Hello' not found in /in/Rb72e on line 17
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[', expecting ')' in /in/Rb72e on line 17
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Parse error: syntax error, unexpected T_STRING in /in/Rb72e on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_STRING in /in/Rb72e on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/Rb72e on line 3
Process exited with code 255.