Computer distinctive number

[Pro2000]

How can I get The visitors' Computers distinctive number?
I know the IP, But it does not works because there are many computers have the same IP number in our country,
Ex: the number 91.144.44.9 is repeated many times by diffrient computers, Some body help me.

[cereal]

You can learn to use sessions:

- http://www.php.net/session
- http://www.php.net/session_start

Bye :)

[Pro2000]

Thanks

[Pro2000]

Hi, when I creat a session_start() in a page,
does it become in all the website's page???
I tried that and maybe it works!!

[cereal]

In order to pass a session from a page to another you need to start, every page, with session_start()

bye :)

[Pro2000]

Thanks, But I know that, However I want to know if I open a page which contains a session
Then I open another Page in another Window Does The session start in the 2nd window?
Thanks

[Anonymusius]

Yes, the server can't see the difference between two requests from different windows (different browsers is another story, you got to have the session cookie for it to work)

[martin5211]

appart from sessions, you could use hash or random ids to reassert an identity coming from one computer