Design a simple shopping cart in PHP MySQL

I would like a simple shopping cart script designed that I can implement into any existing site. I host a number of sites and I want to be able to add a shopping cart to them. - It should be in PHP/MySQL (only 1 database) - I would like an Admin interface that has 2 login types (Super User, User) - Super User has the ability to make changes to all sites - User only has the ability to edit products on there site. Pages ADMIN (User Logged in) - Should be able to view all products, being able to add/edit/delete the products and categories of there store - User should be able to upload images for the products and they should be converted to be displayed on the web. - It should have a section to display a list of orders with the approved payment and shipping address from PayPal ADMIN (Super User logged in) Same as USER but with the abilty to add users and the paypal details. Snippets of Code I want to be able to add snippets of code to an existing website which will display the following Basket, Featured Items, Categories, Product List For example, each of my websites are designed differently, sometimes I would like the shopping cart on the right top, others at the bottom left. I want to be able to just add the code where I want it to be. These snippets should be designed with a CSS so I can easily integrate into my sites. BASKET This snippet should display all products the user has added to there cart. It should have a link to checkout with PayPal. It should send all the information to the user’s PayPal express checkout [login to view URL] FEATURED ITEM The user should be able to select products to feature in a small box. CATEGORIES This snippet should be a small box which has a list of categories. PRODUCT LIST This snippet is where the products are displayed in a table. When a client clicks to add a product to a cart it should then display in the Basket. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Major Browsers