You are required to implement a shopping cart web using PHP. The web application should allow the user to view the items in a catalogue, add items to a shopping cart, remove items from the shopping cart, and to view the contents of the shopping cart.
The items in the catalogue should be stored as an array of objects. (The next assignment will require you to store this list of objects in a database). There should also be pages to allow the user to add, edit and delete items in the catalogue.