four-page-form

A class project of mine: a four-page e-commerce-type application. I hope this code sample is of use to someone else as well.

Project Description

This project demonstrates the "POST-REDIRECT-GET" technique. The assignment was to create a four page e-commerce app with the following stages:

1. Select your products and add them to your cart.
2. Add your billing info.
3. Re-display the order information and allow confirmation.
4. Confirmation message.

Form inputs are validated at each stage. No errors or warnings should occur from pressing the back button in the browser or refreshing the page.

The Database

The configuration settings for the database are found in includes/config.php. After creating the database and adding your configuration settings, you can run the script create_tables\create_tables.php to set up the following database tables:

1. products (the available products)
2. orders (initially empty, entry created for each submitted order)
3. order_item (initially empty, entry created for each order line item)

OOP

The project also includes some object oriented programming, using classes to represent the shopping cart and products. Also included are a FormValidation class and a database wrapper class for mysqli to make it easier to retrieve records as objects. includes/class/ApplicationDB extends includes/class/Database.php with several helper methods specific to the project.