PHP Learning Notes (4) _php tutorial

Implementing a so-called MVC framework in PHP is straightforward. Let's talk about ideas here.

First, the Spl_autoload_register function is used to implement its own type automatic loading mechanism. So no other code needs to think about how to include the file containing the class.

Second, the name of the Controller and action are extracted from the URL, organized to instantiate the controllers class with reflection, and invoke the controller's Execute method. The controller's Execute method also uses reflection to find the action method and invoke it, writing the response object returned by the action to the output stream. Returns a 404 state if the Controller or action does not exist.

To implement a view, you first define a view class that includes another PHP view file in a method that restricts the scope of the variables in the included file. Second, the view class will have a $model attribute that is used to share the data model with the included PHP so that we can easily present the data in the view. Of course, you can also use Ob_start, ob_get_contents, Ob_end_clean these functions to "capture" the content rendered by the view.

Second step, if you want to render a view, then return a viewresponse in the action, want to output a piece of JSON data, return a jsonresponse, the framework provides a base class Actionresponse, Whatever its derived class is, the framework simply writes its generated content to the output.

You need to be aware of the security and performance issues when you actually use them.

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