On Sat, 2010-05-15 at 08:18 +0100, Lester Caine wrote: > Jagdeep Singh wrote: > > How can I define "Machine"? > > That IS the problem. As with a lot of this stuff - nothing was ever actually > DESIGNED to work :( So $_SERVER["REMOTE_ADDR"] will block multiple machines > if > they are sharing the one connection. I've been lucky so far in that > 'REMOTE_ADDR' CAN be resolved to a machine in my own case. > > This like 'tzoffset' is an area where the simplest basic functions actually > need > to be fixed. If you are working cross timezones have you considered the > problem > of knowing the right time where daylight saving is important. My users have > to > set their correct daylight saving zone in their profile. 'tzoffset' is no use. > > Both of these are areas that need fixing? > > ( As an aside ... some schools are now using 'virtual' desktops, so several > pupils may WELL be working on the one 'virtual server' but each in their own > sessions. This makes it impossible to identify the individual users as well ) > > -- > Lester Caine - G8HFL > ----------------------------- > Contact - http://lsces.co.uk/wiki/?page=contact > L.S.Caine Electronic Services - http://lsces.co.uk > EnquirySolve - http://enquirysolve.com/ > Model Engineers Digital Workshop - http://medw.co.uk// > Firebird - http://www.firebirdsql.org/index.php >
I explained off-list how you could do this. Create a hash of the machines IP and browser with the username of the logged in user: md5($ip . $browser . $username); And store that in the database when they log in. Now each time they perform an action, create a hash from those same bits of information again and check it against the one created when they logged in. You can't access their Mac address. Many people on the list have explained that to you now. I'm not sure why an e-learning module needs such strict requirements, as it's perfectly valid that a user might want to use more than one browser at a time. Thanks, Ash http://www.ashleysheridan.co.uk
