This function will help you validate credit card numbers. Works for American Express, Discover, Visa or Mastercard.

Free step-by-step instructions for integrating the secure Authorize.net online payment gateway into your ecommerce website with PHP. Includes the source code for a reusable Authorize.net class as well as the code needed to validate credit card information.

How to create a simple shopping cart solution using PHP and MySQL. This tutorial covers the database design, admin pages, product browsing pages, cart, and checkout. Now it can accept payment with paypal

This allows a user to store clickbank links in a database. Clickbank links are a fairly easy format to understand . Once the information is added to the database we use php to manipulate the data.

We offer a range of eBooks detailing how to get the most out of your Store. Includes "how to design a good looking store", "designing with STS", "Search Engine optimisation" and much more! All at low cost, and all written in clear English.

eLouai FREE shopping cart scripts (PayPal and myPaySystems), Credit card processors (PayPal, 2Checkout, myPaySystems), and Reference guides (PayPal and myPaySystems).

Learn how to make your credit card payment gateway processing transparent to the user using CURL and PHP. These methods will make your website and business appear very professional.

This article explains how to create an interface to CyberCash in PHP, called CyberClass. A duplication of CyberCash's standard API, CyberClass is object-oriented and includes automatic configuration.

Ray Argus and Jerid Freeland roll out a customized shopping cart that has features you won't find in commercial versions. This article discusses sessions, secure servers, and credit cards.

This is the second article in a three-part series dealing with using PHP 4 and MySQL to make a comprehensive e-commerce storefront solution. This article covers session management within the store, user privileges, and a few security concerns.