Yii Container class Dependency Injection

program = algorithm + data structure

The data structure restricts the ===>>>> dependency injection of the algorithm

Dependency injection is the idea of solving data structure and algorithm coupling

<?PHP/** * Created by Phpstorm. * DATE:2016/5/25 * time:18:09 * Container class Dependency Injection*/namespace Frontend\controllers;  UseYii;  UseYii\web\controller;  UseYii\di\container;//Container class Dependency Injection  classDependencyinjectcontrollerextendscontroller{ Public functionActionindex () {$container=NewContainer (); $container->set (' Frontend\controllers\driver ', ' frontend\controllers\mandriver '); //The get method instantiates the Mandriver first, and then passes the return value to car          $car=$container->get (' Frontend\controllers\car '); $car-run (); }  }Interfacedriver{ Public functionDrive ();} classMandriverImplementsdriver{ Public functionDrive () {Echo"I am an old man! "; }  }  classcar{Private $driver=NULL; //Public function __construct (mandriver $driver)//mandriver Strong Association, coupling is too high, so use interface       Public function__construct (Driver$driver)//Line 20th implements interface delivery, eliminating strong dependencies      {        $this->driver =$driver; }       Public functionrun () {$this->driver->Drive (); }  }

Yii Container class Dependency Injection