Getting Users Real IP address using PHP

Question

I want to get the real IP address from users going on my site even if they use a proxy website like hidemyass.com

This is the code I have and thought it worked but I

Answer 1

Unless the proxy puts the real ip address in the headers (common - depending on why the proxy is being used) (generally in some form of "X-something"), then you can only see the ip address of the proxy.