$_SERVER['REMOTE_HOST'] //当前用户主机名 $_SERVER['REQUEST_URI'] //URL$_SERVER['REMOTE_PORT'] //端口。$_SERVER['SERVER_NAME'] //服务器主机的名称。$_SERVER['argc'] //传递给程序的命令行参数的个数。$_SERVER['SERVER_SOFTWARE'] //服务器标识的字串 $_SERVER['SERVER_PROTOCOL'] //请求页面时通信协议的名称和版本 $_SE