How do you detect a website visitor's country (Specifically, US or not)?

Question

I need to show different links for US and non-US visitors to my site. This is for convenience only, so I am not looking for a super-high degree of accuracy, and security or

Answer 1

Simply we can use Hostip API

if($country_code == "US"){ echo "You Are USA"; } 
else{ echo "You Are Not USA";} ?>

All Country codes are here.. http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2