PHP编程：封装ThinkPHP的一个文件上传方法实例

/**     
    * 附件上传:上传图片,缩略图,文件     
    * @param string $model 上传所在模块     
    * @param bool $type 上传文件的类型:：image(图片)；thumb(缩略图)；file(文件)     
    */
            
public function upload($model = null, $type = 'image'){     
       //导入上传类     
       import('ORG.NET.UploadFile');     
       $upload = new UploadFile();     
       $upload->saveRule = 'uniqid'; //设置上传文件规则     
       $upload->maxSize = C('MAXSIZE')*1024*1024;   //上传文件大小         
       $upload->allowExts = explode(',', C('ALLOWEXTS'));//文件类型     
               
       if ($model){     
           $upload->savePath = './Public/Uploads/'.$model.'/';     
           if (!file_exists($upload->savePath)) {     
             mkdir($upload->savePath);     
           }     
       }else{     
           $upload->savePath = './Public/Uploads/Thumb/';     
           if (!file_exists($upload->savePath)) {     
             mkdir($upload->savePath);     
           }     
       }     
       if (in_array($type,array('image','thumb'))){     
           $upload->thumb = true;     
           $upload->thumbRemoveOrigin  = true;// //删除原图     
           $upload->thumbPrefix = 'wb_';         
           $upload->thumbMaxWidth = $type=='thumb' ? C('THUMB_W') :C('IMAGE_W');//缩略图宽度     
           $upload->thumbMaxHeight = $type=='thumb' ? C('THUMB_H') :C('IMAGE_H');//缩略图高度         
                           
       }     
       if (!$upload->upload()) {     
           return $upload->getErrorMsg();     
       }else{     
           $uploadlist = $upload->getUploadFileInfo();     
           if(C('ISWATER') && $type=='image'){     
             import('ORG.Util.Image');     
             //给m_缩略图添加水印, Image::water('原文件名','水印图片地址')     
             foreach ($uploadlist as $key => $value){     
               Image::water($value['savepath'] . 'wb_' . $value['savename'], './Public/admin/images/water.png');     
            }     
           }     
       }     
       if (in_array($type,array('image','file'))){     
           return $this->_add($uploadlist,$model);     
       }else{     
           return $uploadlist[0]['savename'];//返回缩略图保存名称     
       }            
   }     
   /*     
    * 上传的附件整合成attach所需数据,存入表并返回数组     
    * */
   private function _add($uploadlist,$module=''){     
       //$j = count($uploadlist);     
       $v = array();     
       foreach ($uploadlist as $key => $value){     
                   
           $v[$key]['name']        =   $value['name'];     
           $v[$key]['savename']    =   $value['savename'];     
           $v[$key]['savepath']    =   substr($value['savepath'], 2);     
           $v[$key]['size']        =   $value['size'];     
           $v[$key]['userId']      =   $_SESSION[C('USER_AUTH_KEY')];     
           $v[$key]['uploadTime']  =   time();     
           $v[$key]['alt']                 =   $_POST['alt'][$key];     
           $v[$key]['module']          =   $_POST['module'];//当前项目路径      
           $v[$key]['recordId']    =   $_POST['recordId'];//当前项目路径      
           $this->add($v[$key]);     
           if($this->thumb){     
                       
               $v[$key]['prefix']      =   $this->thumbPrefix;                   
           }     
           $v[$key]['id'] = M('Attach')->getLastInsID();                 
       }     
       return $v;     
}