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How to successfully create zip code search functionality

I'd like to create functionality in one project I am working on, which allows users to check whether their home address falls within an area of benefit of three charities (so that they can know whether they can apply for a benefit or not).

Jeremy Castanza
Jeremy Castanza
12,080 Points

I've completed a similar project regarding this recently. I couldn't really find any plugin to do what I wanted to do, so I just built something from scratch in PHP, then used a mySQL table to store the applicable data.

That sounds pretty much what I was expecting Jeremy, would you mind sharing the link to your project, so I can have a look at it please?