php code to generate system information

Hello there.

Can u please provide me the code how to generate php code to check the user system information when the user will be opening that particular browser page.
I have tried to code in .net with c# code, and that works well. But have to generate PHP code for wordpress so that it can tell a user that you are using which operating system on your computer.

Thanks in advance.
Aasim Bashir.

Since this is Wordpress I recommend looking up detect operating system in your add plugins page on your Wordpress blog. The best I was able to find (although I have not tested any of them out) is WP-UserAgent.