What is the right MVC diagram for a web application?

Question

Which MVC diagram is correct? Each have different arrows...

Diagram 1

Answer 1

In fact there's a small difference.

There are two types of Models: Active model and Passive model: the first one has a notification mechanism and the second one is just unaware of being used in MVC.

First and fourth diagrams represent MVC with Active Model.

More about it you can read here.