[moka同学笔记]Yii2 自定义class、自定义全局函数(摘录)

1、在app\components下新建MyComponent.PHP

    namespace app\components;  

    use Yii;
    use yii\base\Component;
    use yii\base\InvalidConfigException;  

    class MyComponent extends Component
    {
     public function welcome()
     {
      echo "Hello..Welcome to MyComponent";
     }  

    }

2、在config/web.php加入你的components

'components' => [  

         'mycomponent' => [  

            'class' => 'app\components\MyComponent',  

            ],
           ] 

3、在controllers/TestController.php中用你的components

namespace app\controllers;
use Yii;  

class TestController extends \yii\web\Controller
{
    public function actionWelcome()
    {
       Yii::$app->mycomponent->welcome();
    }  

} 

原文地址：http://blog.csdn.net/xiaoyangxiaodong/article/details/45078303