Php + MySQL webpages with CRUD functions

The project consist in the development of a set of web pages in PHP connected to a MySQL database (basically CRUD functions). The web site is designed for “sellers” of a franchising network (i.e. books rental) that must record all transactions on the web (but no e-commerce stuff is needed). They (the “seller”(s)) share the list of “customers” and the same list of “products” . Every time a customer buys a product, the "seller": - chooses the product from the database - downloads a PDF related to a "contract" for the product - prints it, the customer signs it, and the "seller" then scans it - He will add/edit the customer to the database - then, he will record the new 'transaction' by adding a new "order" and by uploading the pdf of the signed contract to the server The seller must access to the history of the transactions and should be able to add/edit/view the list of “customers” shared with the rest of the network. Notes: - No extra "sessions" customizations needed* - coder should use a standard login form* - use of OOP is preferred *they’re will be developed by the internal development team, so the coder should use tha fast and basic PHP functions only to build a working web site The coder will be provided with: - MySQL database schema and tables relations with detailed description of the functionality - The list of “products” that “customers” can buy