Yii2 配合ajaxFileUpload 上传文件

1.js

$("input#upload").change(function () {  
          $.ajaxFileUpload({  
              url: '/members/web-members-rest/upload.html',  
              secureuri: false,  
              data:{'id':id},  
              fileElementId:'upload',  
              dataType: 'xml',  
              success: function (data, status) {  
                  if ($(data).find("result").text() == 'Success') {  
                      //上传成功  
                  }  
                  else{  
                      alert("上传失败");  
                  }  
              },  
              error: function (data, status, e) {  
                  return;  
              }  
          });  
      });  
      $("a.upload").click(function(){$("input#upload").click();});

2.htm

    <a href='javascript:;' class="upload">上传</a>  
    <div style="display:none"><input type="file" id="upload" name="UploadForm[file]" /></div>  这个name很重要  
    <img data-name="img" src="blank.gif" />

3.php,rest

 public function actionUpload(){  
    $params=Yii::$app->request->post();  
      
    $model = new UploadForm();  
    if (Yii::$app->request->isPost) {  
        $model->file = UploadedFile::getInstance($model, 'file');  
        if ($model->file && $model->validate()) {  
            if(!file_exists('data/upload/'.$uid))mkdir('data/upload/'.$uid);  
            $path='data/upload/';  
            if(!file_exists($path))mkdir($path);  
                      
            $filename=$params['id'].'.' . $model->file->extension;  
            if($model->file->saveAs($path.$filename))  
                return ["result"=>"Success","url"=>$path.$filename];  
                      
            else return ["result"=>"Fail"];  
        }  
        return ["result"=>"ValidFail"];  
    }  
    return ["result"=>"PostFail"];