03-16-201110:59 AM - edited 04-24-201204:41 AM
The payment form we created in the first five parts of this series is very good. But it could be better. Part 6 begins a new chapter in this series where we improve upon our payment to make it more usable, secure, and maintainable. We begin by preventing users from making duplicate form submissions by using the POST/REDIRECT/GET design pattern.