referer tracking, database and php, cgi

I need to track the href of all my visitors from any page on my site. When any page loads, it should check if the pass variable is already in place. If it is not, it should capture the href, store it into a database and assign its pass variable. If the href already exists in the database, it should add a hit and send the same pass code through the pages. I need to track the code everywhere within the website and then update a number of href's on the final 'join' page. For example click">http://www.someplace.com/cgi-bin/+PASSCODE&soads+2323">click here for 10 click">http://www.someplace.com/cgi-bin/+PASSCODE&soads+2020">click here for 20 maybe using php or something. An existing script will take the pass code and pass it back to my site if the transaction is processed. I would then need a script on my end to get the passed information and process it into the database. At that point I would like to be able to display the database data online (as much info as possible, but primarily would like a chart that will display all the href information, hits and sales completed. I also need to output the information in a format that can be converted into an excel file. I have put the post back information at the bottom of th Let me know! Bryan here is some more info on the post back: If you decide to use this please send your script URL when you are ready. POST BACK: You can specify one script to post back to per product code. It is your responsibility to write the script that handles the posted information -- or to hire someone to write it for you. site optional reseller code that you pass to Epoch name customer's name address customer's street address city customer's city state customer's state zip customer's zip country customer's country email customer's email address ipaddress customer's ip address username customer's username password customer's password order_id customer's Epoch assigned order id (member id) product_id product code for the product purchased x_ can be used as pass through fields. EX: x_petsname=x_shoesize=x_haircolor= ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform unix, php, mysql