src/Http/Response.php
private function sendHeader()
    {
        $contents = $this->getHeader();
        if (!empty($contents)) {
            if (!is_array($contents)) {
                $contents = array($contents);
            }

            foreach ($contents as $content) {
                header($content);
            }
        }

        return $this;
    }
private function sendHeader()
    {
        $contents = $this->getHeader();
        if (!empty($contents)) {
            if (!is_array($contents)) {
                $contents = array($contents);
            }

            foreach ($contents as $content) {
                header($content);
            }
        }

        return $this;
    }
发送header

@return $this