src/Http/Response.php
private function flushContent($message, $tpl = '')
    {
        if (null !== $tpl && is_file($tpl)) {
            require $tpl;
        } else {
            echo $message;
        }

        return true;
    }
private function flushContent($message, $tpl = '')
    {
        if (null !== $tpl && is_file($tpl)) {
            require $tpl;
        } else {
            echo $message;
        }

        return true;
    }
输出内容

@param string $message
@param string $tpl
@return bool