Tracing location in PHP

Hello I need to trace a users location with their IP. I know traceroutes aren't the most precise, I don't really need precision maybe state (if in the U.S.) or just country. I don't really have any system commands that will give the location so system() and passthru() are somewhat obsolete unless I can find a command line tool to do this. Can anyone help me out?

what you need is a database full of domains matched with countries.

thats how IP-to-location websites work.

im sure they'll be a database ropen to public.. or atleast documents on how to create one.