How does the php mvc framework work?

MVC working principle

Model: Model layer, processing data.

View: View layer, displays data and interacts with users.

Controller: Controller layer, business processing, including obtaining and processing the data passed by the view layer, receiving the data results processed by the model layer and assigning them to the view layer.

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Life case understanding:

Actual MVC principle understanding:

1. The controller calls the view layer to display the view (form) to the user.

2. The user fills in the form and submits data to the controller.

3. The controller submits the request data to the model layer for processing according to the user's request.

4. The model needs to establish a connection with the database.

5. Perform related operations (addition, deletion, modification, and query) on the data submitted by the user and the data in the database.

6. The database returns the operation results of addition, deletion, modification and query to the model layer.

7. The model layer performs relevant processing on the results and returns them to the controller.

8. The controller distributes data to the view layer.

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