Website Access Restriction

I need to ban some countries from my website. I would prefer a PHP or javascript code. Standard web hosting package. I need the code to be able to be "pastable" into my index page. If the visitor is from Country "A" you will not be able to access site and get redirected to [login to view URL] and if you are from anywhere else you will be allowed to access website. Before I accept quote I will require proof of skill by means of test. If you can do this we should be able to block my IP and test thru alternate connection. ## Deliverables Self Suffcient script. Must identify the Country of browser and then either deny or allow. ## Platform PHP preffered or Javascript Will run on Linux shared hosting