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By jpalmer
via jason-palmer.com
Published: Dec 26 2006 / 13:13

Validating Zip Code Locations with PHP
This is a great article which explains how to validate the location associated with a zip code. Great for E-Commerce websites or any website which depends on accurate geographic data! The article includes a simple function written in PHP with implements this functionality.
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zomg replied ago:

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Anyone have a preferred method of doing this without the 3rd party? I just wouldn't want a crucial portion of my site to rely on another site.

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pcx99 replied ago:

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The USPS actually has a program where they'll send you a dabase on a CD. I think they charge a nominal fee for it now and a higher fee if you want to redistribute that data. Back in the 80s they would send you zip+4 databases for free, monthly, on about 10 reel to reel magnetic tapes. It made backing up our computer system REALLY cheap :D :D

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