Postback notifications on complete website

I need someone to install PHP postback notification code for 6 'offer walls / survey sites' on my website. This will be super easy for the right person - only a couple of hours work at most. If you are familiar with 'offer wall' or 'survey' sites it works like this. I have 7 (in total) offerwall or survey companies that show their offers or surveys in my member login panels via an iframe. It then gets the parameters such as IP / username / survey value etc. When one of my members completes an offer or survey, the offer wall company notifies my website that the requirements of the offer have been met. My website then adds a % of the publisher revenue to the members account balance automatically. This is extremely quick because the SQL code to credit my users account balance has already been written and works. One of the offer wall companies postback file is complete and working. It can be used for reference. Really the other 6 files are postbacks with slightly different security features and variables. For example userid could become user_id etc. Really this is about structuring each file correctly for each offer wall company, and making sure the security is structured correctly. It is very simple - only a few lines per file: Job details: Login to 6 offer wall accounts I have, and check the IP addresses and variables Write the code according to their security spec (Generally only allow notifications from specified IP addresses and / or signatures) Test the postbacks work, and credit the user and referrer accounts accordingly. I will help you test if required (take a survey and stuff). This has to be done very quickly and tested properly. This is a huge website, and I provide a lot of extra work but this is the final tiny bit before I can initially launch the site. Login docs and more detail provided when we talk.