给评论添加Ua标识

UserAgent

获取真实ip

//** 防止CDN造成无法获取客户真实IP地址 */
if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) 
{
$list = explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']);
$_SERVER['REMOTE_ADDR'] = $list[0];
}

原地址https://doge.uk/coding/useragent-modify.html