/**
* [uploadFile 上传文件接口]
* @param [type] $filePath [文件路径]
* @param [type] $bucket [自定义空间名称]
* @param [type] $key [null]
* @return [type] [description]
*/
public function uploadFile($filePath, $bucket, $key = null)
{
$uploadRet = ImageV2::upload($filePath, $bucket, $key);
return json_encode(array('error' => $uploadRet['code'], 'msg' => $uploadRet));
}
