As the name implies, middleware sits in the middle of a sequence of function or method calls. Accordingly, middleware is well suited for the task of "gate keeper". You can easily implement an Access Control List (ACL) mechanism with a middleware class that reads the ACL, and allows or denies access to the next function or method call in the sequence.
status. In this illustration, the level is defined as follows:
'levels' => [0, 'BEG', 'INT', 'ADV']