Is it possible to establish a catchall controller method?

James,
a question about your controller extension:

Code:

class Oops extends Application {

...

The extended controller "Application" does not exist in my CI 3.0 code.  Where is it located? Or is it just an example name?

CI 3.1 Kubuntu 19.04 Apache 5.x  Mysql 5.x PHP 5.x PHP 7.x
Remember: Obfuscation is a bad thing.
Clarity is desirable over Brevity every time.