I'm building a website where I will need to be able to process credit cards. I've been swamped with information about shopping carts with tons of features I don't need, but I've had a hard time finding what I'm looking for.

I am imagining something very simple that I can insert into my page. My code calculates pricing already but I'd like to be able to just pass the price over to a credit card processing app with text boxes to collect all the buyer's payment information and has a submit button on it. On submission, the app will return either a success or fail to me and I can continue with printing a receipt or a rejection.

I'm wondering if anyone has suggestions on where to look for examples and information on integrating of this type of thing into my web page.