If you have not done any programming what so ever you may struggle with the likes of PHP etc. However any competent programmer will quickly be able to pick it. Well its late, you know what you want to do, I am not going to discuss the why and hows of it all, you obvisouly want online links, heres a few I have used and found useful.
To learn the basics then W3 Schools is first stop click here combined with web monkey click here
If you want to start to look at some simple if/else statements to serious heavyweight automated interactive membership projects then phpfreaks tutorials are excellent. click here
There are others but no doubt other people will post them. Its nearly 2am and my brain has stopped functioning !
One last word, have fun , don’t give in and do not be afraid to ask for help there are quite a few of us on here who have a good working knowledge of php