This:

$query = "SELECT * FROM php_zip_code_distance WHERE (latitude <= $latN AND latitude >= $latS AND longitude <= $lonE AND longitude >= $lonW) AND (latitude != $lat1 AND longitude != $lon1) AND city != '' ORDER BY state, city, latitude, longitude";

Becomes this:

$query = "SELECT * FROM php_zip_code_distance WHERE (latitude <= $latN AND latitude >= $latS AND longitude <= $lonE AND longitude >= $lonW) AND city != '' ORDER BY state, city, latitude, longitude";

While testing yesterday I found an interesting issue with your base code. When searching for a radius of zips, it does not return the zip of the initially search zip and perhaps more. So I went back to your demo and it exhibits the same issue. Since I am in Connecticut, I tried to use a zip code 06896 and it find the zip, then display all the zips except for those in Redding, (the zip code I used) Actually there are 4 zipcodes tied to Redding so I’m guessing that the searched zip code and any other the same town are not being returned. It is not just this zip code that manifests the issue. Try 10010 a NYC zip.

I’ll need to figure out what your zip list routine is doing and adjust it.
thanks

For instance, the ‘radius search’ program requires numeric fields of some sort for lat/long, but the two-level state/city article doesn’t need numeric lat/long. And I’m having difficulty with the import of the zip.csv file into the lat/long fields.

So the field types/lengths is important information, IMHO.

Thanks…Rick…

Might I suggest that, since you are not providing the zip code database in your download, that you describe the structure of the zipcode table.

Thanks…Rick…

I have corrected the size of the latitude and longitude columns, re-imported the data and the demo should now be returning proper values. Apologies and thanks for catching my error.

Entered zip code 94087 (sunnyvale,ca) ( 37°22?7.56?N 122°2?13.4?W? / ?37.3687667°N 122.037056°W? / 37.3687667; -122.037056.)

But it is returning incorrect result. Does Db incorrectly contain sunnyvale long as -99.99 or it is script issue.
Thanks,
Neel

=============
Sunnyvale California 37.350091 -99.999999 37.711898145195 36.988283854805 -99.542662827632 -100.45733517237

City State ZIP Code Latitude Longitude Miles, Point A To B
Ashland Kansas 67831 37.196075 -99.776620 16.251589044657
Bloom Kansas 67865 37.394383 -99.967230 3.550269445576
Bucklin Kansas 67834 37.523175 -99.634350 23.355813537495
Englewood Kansas 67840 37.040749 -99.989030 21.383310186967
Ford Kansas 67842 37.549041 -99.748690 19.468577369373
==============================

I was actually thinking on purchasing something since you have been very helpful.

I will try to work it out, but I may need more assistance in doing that.

Thank you and God bless,
Johnathan

Another would be to query, put the records returned into a two-dimensional array, calculating the distance as you do so and adding it as a cell of the array. Then, you sort your array on the distance and output records that way. The benefit of this approach is that, if you don’t know much about MySQL or are seeing performance problems in MySQL, it’s a bit easier for most Web servers and new programmers to handle.

Best of luck with your project. If you’d like any further assistance, I’d ask that you purchase something from my Amazon wish list, which is linked under Copyright, Attribution and Donations.