Php Distance Script Calulator

[BlackRaven]

Hi, i am looking for recommendations for a script for my dating site, that will tell the distance between two zip codes. It should be able tell the distance through the zip/postal code for the following countries

Canada
United States
Ireland
United Kingdom

I have found individual scripts for Canada, United States and UK but none for Ireland. Also prefer if the db has the longitude/latitude as will be using those two columns to create a master list for my site. Thanks again for all your recommendations.

[rocknbil]

Integrate with the Google Maps API? Should be fairly straightforward and will even provide driving directions.