$filename = $navi_html_static_path . '/' . $zip_name . '.zip';
header("Cache-Control: public");
header("Content-Description: File Transfer");
header('Content-disposition: attachment; filename='.basename($filename)); //⽂件名
header("Content-Type: application/zip"); //zip格式的
header("Content-Transfer-Encoding: binary"); //告诉浏览器，这是⼆进制⽂件
header('Content-Length: '. filesize($filename)); //告诉浏览器，⽂件⼤⼩
@readfile($filename);