我调用success函数出错，搞了办半天也没明白，高手看看？？？用的是thinkphp5.0

{

    $add='add';

    return ($this->success('dsfafdadfs',$add)）;

}

 * 获取输出数据

 * @return mixed

 */

public function getContent()

{

    if (null == $this->content) {

        $cOntent= $this->output($this->data);



        if (null !== $content && !is_string($content) && !is_numeric($content) && !is_callable([$content,'__toString',])) {

            throw new \InvalidArgumentException(sprintf('variable type error： %s', gettype($content)));

        }



        $this->cOntent= (string) $content;

    }

    return $this->content;

}



/**

 * 获取状态码