I need to have a section of my website (admin side) that tracks membership payments from users. They will be subscription payments, $20 per month, and I just need it to be automated that when they send payment, I can approve it. I need to make sure that there is only one paypal payment per paypal address also. What programming language would this be in? I'm not looking to do it myself, I need to pay an experienced programmer, but I would like to know what language will be needed for this task. Also, if you know of anyone that can program something like this (there are other items that need to be programmed to), I am looking to spend a few hundred dollars to have it implemented onto a social networking site (something free, like phpizabi). Thanks for your help!