Effective Geotargeting with PHP

By Akash Mehta
2008-01-27


IP Targeting: It’s tricky business!
For geo location, the IP address of your users is probably the most useful piee of information. The IP address of a user can be matched against a database of current IP allocations globally to work out where the user is based; the trouble is maintaining an up-to-date database of the current IP allocations. Economies of scale kick in at a point, and a company called MaxMind manage to offer some pretty accurate geolocation technology entirely free of charge. If you're interested in the technical details, they have a detailed explanation of the IP location process on their website. Their database is so popular that there's even a PEAR package to suit, although MaxMind provide their own pure PHP library and PECL extension — we'll cover both pure PHP versions in this tutorial.

Tutorial Pages:
» Introduction
» IP Targeting: It’s tricky business!
» Getting started
» Let's write some code!
» Tips and tricks
» Going further

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