Wow, you need to SERIOUSLY drill down and ask a lot of questions before you can decide. Consult with online software engineers, describe your project to them and work through a little Q/A session to come up with some good leads.
There is no "best technology" ... there are only different technologies for different needs.
If b "web based project" you are simple referring to a website, perhaps with different systems like a blog, forum or social networking capabilities - I recommend WordPress because it has the most modular features built out already in plugins, along with lots of theme options. BuddyPress gives a lot of possibilities for creating user-based websites.