Looking for a simple, yet secure order form that will eventually send the data to a shopping cart application.
The three pages needed will verify required information is entered into each field, validate certain field, i.e. valid email, etc.
If a page fails validation, it would redirect back to the failed page, and all forms fields should have the customers information pre-populated into. Also, I would like to include a back button so the customer can go backwards in the form, and all data is shown.
After the last page is submitted, last page form values are validated, I will handle the step of posting the data into the shopping cart app.
Lastly, on the first page, the customer is required to type there email address and a password. The scripts will need to check if that customer has registered before. I will code the username check, but the code surrounding that should be there.
This code needs to be 100% secure to not allow a hacker to try and force the submission of the page.