As far as tracking them (disclaimer I've never actually used this before) I don't think you would need to compare people's individual cookies to any sort of data (logs, dbs etc) but as you stated you would probably want to use a DB for keep a log of people
Just for tracking you could set a date in the cookie to see when they last visited. You can use $ENV variables to get the page their on, their IP address and tons of other information.
In reply to Re: Implementing Cookies
by cfreak
in thread Implementing Cookies
by filmo
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