hope I had been obvious, I am focusing on a task for any College... I had been requested to produce a website for 3 different customers:

Partners (like museum, gallery...): having a personal page if at all possible, they need to present their weekly program, timetable....

Teacher: they need to book a trip of the partner activity for his or her class...

Administration: must have an introduction to all activities, should manage roles, they have to find out if an instructor that has reserved something for his class has paied it, otherwise he have to send a mail, he should also erase activity if problems happened and so forth...

are you aware any php script or something like that else free of charge or otherwise? Thanks ahead of time! Antek

Thanks for visiting SO! Educate yourself around the FAQ to discover what's on subject here : http://stackoverflow.com/faq

You are posting within the wrong place as well as your question will probably be closed soon.

For the question itself, the first thing is always to take a look at PHP Access Control Lists : http://www.google.lk/search?q=php+access+control+lists

This provides you with a concept for making role based programs