Search filter that returns results based on proximity to selected zip code.
The ability to filter a group of locations based on proximity to a given zip code is a common functionality provided by many websites; it may be used to locate stores, jobs, schools, parks, restaurants, etc. within a configurable distance from a specified zip code. The proximity search filter provides a solution for this need. It currently comes fully integrated with a custom table of all U.S. zip codes, and could easily be modified to work with any custom table of zip codes.