Yii2 自定义组件

basic\components\HelloWidget

namespace app\components;  
use yii\base\Widget;  
use yii\helpers\Html;  

class HelloWidget extends Widget  
{  
    public $message;  
 
    public function init()  
    {  
      parent::init();  
       if ($this->message === null) {  
          $this->message = '您好';  
        }  
    }  
  
   public function run()  
    {  
        return Html::encode($this->message);  
}  

　　

View

[php] view plaincopy在CODE上查看代码片派生到我的代码片
<?php  
use app\components\HelloWidget;  
?>  
<?= HelloWidget::widget(['message' => '组件']) ?>