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Effective Geotargeting with PHPBy Akash Mehta2008-01-27
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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