問題描述

我剛剛進(jìn)入 MVC 設(shè)計(jì)模式.這里的一個(gè)簡單示例并沒有明確我對控制器使用的概念.能否請您解釋一下控制器的實(shí)際使用，同時(shí)保持簡單.

I am just heading into MVC design pattern. A simple example here does not clear my concept about the use of controller. Could you please explain real use of controller while keeping it simple.

型號(hào):

    class Model {
       public $text;

       public function __construct() {
           $this->text = 'Hello world!';
       }        
    }

控制器:

      class Controller {
          private $model;

          public function __construct(Model $model) {
              $this->model = $model;
          }
      }

查看:

      class View {
         private $model;
         //private $controller;

         public function __construct(/*Controller $controller,*/ Model $model) {
             //$this->controller = $controller;
             $this->model = $model;
         }

          public function output() {
               return '<h1>' . $this->model->text .'</h1>';
         }

      }

索引:

      require_once('Model.php'); 
      require_once('Controller.php');
      require_once('View.php');

      //initiate the triad
      $model = new Model();
      //It is important that the controller and the view share the model
      //$controller = new Controller($model);
      $view = new View(/*$controller,*/ $model);
      echo $view->output();

推薦答案

MVC 模式中控制器的目的是改變模型層的狀態(tài).

Controllers purpose in MVC pattern is to alter the state of model layer.

它是通過控制器接收用戶輸入來完成的(優(yōu)選 - 抽象為諸如 Request 實(shí)例之類的東西)，然后根據(jù)從用戶輸入中提取的參數(shù)，傳遞模型層適當(dāng)部分的值.

It's done by controller receiving user input (preferable - abstracted as some thing like Request instance) and then, based on parameters that are extracted from the user input, passes the values to appropriate parts of model layer.

與模型層的通信通常通過各種服務(wù)發(fā)生.反過來，這些服務(wù)負(fù)責(zé)管理持久性抽象和域/業(yè)務(wù)對象之間的交互，也稱為應(yīng)用程序邏輯".

The communication with model layer usually happens via various services. These services in turn are responsible for governing the interaction between persistence abstraction and domain/business objects, or also called "application logic".

class Account extends ComponentsController
{

    private $recognition;

    public function __construct(ModelServicesRecognition $recognition)
    {
        $this->recognition = $recognition;
    }

    public function postLogin($request)
    {    
        $this->recognition->authenticate(
            $request->getParameter('credentials'),
            $request->getParameter('method')
        );
    }

    // other methods
    
}

控制者不負(fù)責(zé)什么?

MVC 架構(gòu)模式中的控制器不負(fù)責(zé):

• 初始化部分模型層
• 從模型層檢索數(shù)據(jù)
• 輸入驗(yàn)證
• 初始化視圖
• 選擇模板
• 創(chuàng)建響應(yīng)
• 訪問控制
• ...等

這篇關(guān)于MVC模式中使用PHP的控制器的目的是什么?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網(wǎng)！