I'm not referring to
Let's say my real external IP is 4321.4321.4321.4321 and I'm using a proxy which is 1234.1234.1234.1234
If I just use $_SERVER['REMOTE_ADDR'] it will only tells that my IP is 1234.1234.1234.1234
I hope it could tells the external IP even you are on a proxy.
Thanks in advance and any helps will be appreciated.