Online PHP editor | output for nf0Hu

Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: You wanted a mushroom haircut, no problem You wanted a shave haircut, no problem Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, function "woops" not found or invalid function name in /in/nf0Hu:8 Stack trace: #0 {main} thrown in /in/nf0Hu on line 8
Process exited with code 255.
Output for 8.0.0 - 8.0.9: You wanted a mushroom haircut, no problem You wanted a shave haircut, no problem Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($function) must be a valid callback, function "woops" not found or invalid function name in /in/nf0Hu:8 Stack trace: #0 {main} thrown in /in/nf0Hu on line 8
Process exited with code 255.
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, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: You wanted a mushroom haircut, no problem You wanted a shave haircut, no problem Warning: call_user_func() expects parameter 1 to be a valid callback, function 'woops' not found or invalid function name in /in/nf0Hu on line 8
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: You wanted a mushroom haircut, no problem You wanted a shave haircut, no problem Warning: call_user_func(woops): First argument is expected to be a valid callback in /in/nf0Hu on line 8
Output for 4.3.0 - 4.3.1: You wanted a mushroom haircut, no problem You wanted a shave haircut, no problem Warning: call_user_func(woops) [http://www.php.net/function.call-user-func]: First argument is expected to be a valid callback in /in/nf0Hu on line 8