Topic for a term paper flowing into a diploma?

Question

Startups

Dear community, help with the search and selection of ideas for the subject.
I would like something aimed at an online service. I do not want some kind of overly difficult task, for example, connected with a university, which teachers from the department impose on us. I would like something interesting, perhaps something multimedia, there are no restrictions on the choice of tools, i.e. I can write at least on anything, more precisely on what I can (I have programming experience in php, I know html, css, javascript, of course, at the student level).
The use of a database is mandatory, they don’t take games and the like as an idea ...
I want me not only to make a diploma for the sake of a diploma, but also, if possible, it would be a useful “product”, if you can call it that, I’m tired of coursework like “warehouse”, "hotel", etc., which our department has been giving for 5-7 years.
Maybe someone had ideas when they were studying, but for some reason they didn’t implement them, I would be glad for any idea, otherwise I don’t even have anything to choose from.

Answer 1

A friend of mine made a diploma about a system of web testing for students: the teacher creates his own tests to check the level of training of students.
The trick was in the very wide functionality and simplicity of the test constructor, the questions could be very diverse: videos, pictures, formulas ... A friend had a lot of ideas on this topic, but he didn’t finish everything .

Answer 2

My topic is also smoothly flowing into a startup.