$upload = CUploadedFile::getInstance($articleModel,'thumb');

            if($upload){

                $name = date("Ymd"). time() . mt_rand(0,999);

                $img = $name . '.' . $upload->extensionName;

                if(!file_exists($this->upload_url)){

                    dir_create($this->upload_url);

                }

                $upload->saveAs($this->upload_url . $img);

                $data['thumb'] = $this->upload_url . $img;

            }