I am planning to make a project management with PHP/MySQL/Codeigniter.
It will have 10 - 20 users and 20 - 30 projects going on at the same time.
Let's say John is a member of project A, B and C. Cindy is in A, D, F G etc.
I want to make it only members of project can access the project.
Now I am not sure how to approach this.
What do you suggest in terms of DB-design and session.
Any resources will be appreciated.