Publisher review:lat/long distance - Calculate the great circle distance between two latitude/longitudes Calculate the great circle distance between two latitude/longitudes.
Assume your points, in decimal, are in $lon1,$lat1 and $lon2,$lat2. This can also be useful with the US ZIPcodes.
lat/long distance is a PHP script for Snippets scripts design by David Sklar.
It runs on following operating system: Windows / Linux / BSD / Solaris.
lat/long distance - Calculate the great circle distance between two latitude/longitudes
Operating system:Windows / Linux / BSD / Solaris
lat/long distance script details 
