Hello, i want to develop a real-estate website with php and mysql. But i don't know how to handle big projects, how to make complex classes, structures and hierarchies. I want to read articles about this but i don't know how to find them. I am simply looking for the relevant keywords to search in google. Do you understand what i am looking for? I want to learn how to organize functions, classes and files in a php project.. I hope it makes sense.. Please let me know if it is not clear to you..

Any help will be appreciated.. Thanks, Regards

It sounds like what you need is general programming advice. I recommend this book: http://www.amazon.com/Pragmatic-Prog.../dp/020161622X
It has much of what you need, though it is not focused on any particular language.

If you need to get the project online real fast, I suggest using an open source real estate software, or buying a license for a commercial project, as developing such a script could take ages if you are not used to such projects.

Some links that might help you get started:

http://www.open-realty.org/ (The famous one, Open Source)
http://www.landshop.gr/ (Found it via google, Open Source)
http://www.hotscripts.com/PHP/Script...ate/index.html (Commercial and open source real estate script)