Daily Deal Aggregator (Back End Scrapping)

We require ONLY the back end development of a copy of approximately 5 Groupon related site where a daily deal is posted and a counter tracks purchase of that deal. Requirements: 1. Able to automatically aggregate all the daily deals for the site we provided into the mysql database. The info needed including: Deal provider, deal image, recommended retail price (merchants price), discount price, Discount percent, Saved money, Time left to buy (show expired if closed), Category if provided. 2. The aggregate function/ grabber can either be triggered by a button in the admin page or fire off through the timer e.g. 30 minute interval set inside the admin panel. The code must be dynamic so we can add more sites and rules when we want. We ONLY the back end portion of the code to be completed. NO websites/ webpage design are required in this project. We limit enforce that PHP/ cURL to be used for the data scrapping process. *Notes: For the part of adding new site and amend rules must be well documented.