Posted by Beauregard T. Shagnasty on 06/19/07 16:36

vunet.us@gmail.com wrote:

> On the website form, if user enters invalid address, is there a tool
> to check city, zip, etc. for USA? I want to avoid users entering some
> blah-blah info when registering with my service.

You would need a back-end database containing all the ~43,000 US
zipcodes and their associated cities. You would also need the
server-side processing to manage it.

Note that some adjacent, small cities (towns/villages) share a zipcode,
so you would have to code appropriately.

You can purchase zipcode databases (tables) at various web sites for as
little as $150US per year. There are normally quarterly updates.

A visitor, once realizing you are checking zipcodes, may still enter a
bogus name and street address.


Anony Moose
123 Blahblah Street
Zap, ND 58580

--
-bts
-Motorcycles defy gravity; cars just suck

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