composer require aliyuncs/oss-sdk-php

<"$url");die();

   //   $res = true;
    //   return $url;
  }


  /**
   * 删除指定文件
   * @param $object 被删除的文件名
   * @return bool  删除是否成功
   */
  public function delete($object)
  {
    $res = false;
    $bucket = Yii::$app->params['oss']['bucket'];  //获取阿里云oss的bucket
    if (self::$oss->deleteObject($bucket, $object)){
    //调用deleteObject方法把服务器文件上传到阿里云oss
      $res = true;
    }
    return $res;
  }

//测试
  public function test(){
    echo 123;
    echo "success";
  }
}

  'Aliyunoss' => [
    'class' => 'common\components\Aliyunoss',
   ],

'oss' =>[                     //阿里云OSS
    'ossServer' => 'oss-cn-   .aliyuncs.com', //服务器外网地址，
    'ossServerInternal' => 'oss-cn-   .aliyuncs.com', //服务器内网地址
    'accessKeyId'=>'    ',
    'accessKeySecret'=>'     ',
    'bucket' => '    ',
    'endPoint' => '     ',
  ],

//阿里云OSS执行
use common\components\Aliyunoss;

 public function actionAdd(){
    $img_banner = trim($_FILES['vend_banner']['name']);
    $img_banner = explode('.',$img_banner);
    $imgs_banner = $img_banner[1];
    $img_banner = date('YmdHis').mt_rand(100,1000).md5($img_banner[0]);
    //文件重命名
    $vend_banners = "./images/upload/".$img_banner.'.'.$imgs_banner; 
    $vend_banner = $img_banner.'.'.$imgs_banner; 
   
    $uploadPath = dirname(dirname(__FILE__)).'/web/images/upload/'; // 取得临时文件路径
      if (!file_exists($uploadPath)) {
        @mkdir($uploadPath, 0777, true);
      }
    $file_Path_vend_banner = $uploadPath.$vend_banner;
    $filepath_vend_banner=str_replace("\\", "/",$file_Path_vend_banner);//绝对路径，上传第二个参数
    $object_vend_banner="data/Company/".$vend_banner;      //拼接存储路径和文件名称，上传第一个参数
    if(is_uploaded_file($_FILES['vend_banner']['tmp_name'])){ //判断是否post上传
      if(!move_uploaded_file($_FILES['vend_banner']['tmp_name'],$vend_banners)){
        //移动到临时目录里
        echo 'banner上传失败';exit();
      }
    }
    $vend_banner_url = Yii::$app->Aliyunoss->upload($object_vend_banner,$filepath_vend_banner);
     //调用新建的文件，执行OSS上传，返回的是上传到阿里云的OSS文件路径，打印出来是：
    //string(116) "http:// ******.oss-cn-******.aliyuncs.com/data/Company/20170908124236303cc17c30cd111c7215fc8f51f8790e0e1.jpg"       

$oss_url=$data2[0]['vend_banner'];//只要（上传时候的）图片名，
$object="data/Company/".$oss_url; //将你阿里云的存储路径+图片名=组成数据
$is_del = Yii::$app->Aliyunoss->delete($object);//删除指定的图片，返回true,否则返回false