PHP Logic problem...am clueless

Hiya guys, I have a little problem that I cant seem to figure out...maybe you can help me. I dont know exactly how to explain it but Here goes: (I will be getting a "productId" from somesite.com via the "POST" method.) I am giving a client a config.php file where he will add something like this: $productId=1; $site=(site to go to comes here) $productId=2; $site=(site to go to comes here) $productId=3; etc I have no idea how many productIds/sites the client is going to put in config.php The script that will be doing all the main processign is: main.php If you have any ideas I would love to hear of them or if you think this is hopeless tell me and I'll drop the whole notion....coz right now I am as clueless as a woman in a shoeshop :-) Kindly reply. Cheers, -Ryan