Payment Processing?

I am going to be building a custom E-shop that will require credit card payment processing.
I'm not totally sure how to go about doing this. What I need is a service where I can send a credit-card #, the cost, and any other relevant information to a URL and if

1) the payment was accepted, the service should return some confirmation data
2) if the payment was not accepted then some data should be returned stated the reason for denial.

I've looked at authorize.net, but not sure if thats what I need. Could someone plx point me in the right direction?
Thanks!

Originally Posted by iloveitaly . What I need is a service where I can send a credit-card #, the cost, and any other relevant information to a URL and if 1) the payment was accepted, the service should return some confirmation data 2) if the payment was not accepted then some data should be returned stated the reason for denial.

I wish it were that easy There are 2 ways to use Authorize.net, Simple Integration Method and Advanced Integration method. Check out the "Resources" link at Authorize.net. However authnet seems to be running slowly right now so check out: http://www.scripts.com/php-scripts/e...gateway-script

Regards,
Patrick