How to implement a user account?

Question

PHP

Tell me, do I have an account in my personal account, deposit and withdrawal of funds is carried out through the API of payment systems, and internal operations, for example, bought a service, and so on, do we do it all inside the site? Is the invoice amount stored in our database?

Answer 1

Yes.
Create a separate table with a log of actions (for example, id, type, amount, user_id), and the user's balance field.