The assignment requires the development of a PHP-based system that handles booking requests for classes with limited availability. The system must be built upon a MySQL database that tracks available places, successful bookings, and class schedules. The system should ensure that each request is processed only when the 'Submit' button is pressed and produce error messages if necessary data is missing. Additionally, it should list only classes with available spaces in the first menu and dates/times for selected classes, while also providing a 'sensible' ordering of entries. The system must handle cases where two users simultaneously request a booking, ensuring that only one request is successful. Proper commenting and code quality are also essential.