User Agent: or I'm doing something wrong or the library is missing something

[eluser]D3N14M[/eluser]
Actually, for this project it is very relevant (otherwise I wouldn't be asking of how knowing it :p). Actually, de User Agent library of PHP can obtain the model, the manufacturer, the OS, and some more info.

I wanted to know if the library was made thinking about getting this info, or if I had to make an extension for it so I can get this info.