Need to update website by using php

Hello, We have a current website that uses php. We have a prooducts that get updated on our website by using an excel spreadsheet, but its not working. Here is what we need. 1. We list domain names on our site for sale. We would like to update the sold one easily. We used to be able to do it by just updating a excel document but its not working. This should be a simple task. Thanks!