IP filtering

[eluser]Animas[/eluser]
I need to show ads based on country IP range. If I want to show "advertise.png"(in root folder) to usa visitors only how do I write the code?

[eluser]Rokit[/eluser]

Code:

gethostbyaddr($ip);

[eluser]Animas[/eluser]
Hmm. Will give that a try. Thanks.