[eluser]D3N14M[/eluser]
The model that I'm looking for is not for PC, is for mobile devices. I have seen lots of webs (specially webs of mobile content) that recognizes the model of the mobile, the OS, etc. And its captured by the User Agent header information, so if PHP can obtain some of the User Agent, it can obtain all of it. Since there's no much mobile devices that doesn't support Javascript, I need to obtain it by PHP.
So if the library doesn't obtain it, I'll have to make an extension to obtain the info that I need.