Re: login system question

Since the http protocol is stateless, you really can never know when a user has left your site or turned off their computer. All you can do is make a judgement about how long a login session will last, and then make the login cookie expire (or take their login cookie away if the database record for expiry time associated with their login cookie is past) after that amount of time, forcing the person to login again. You can do something like resetting a new cookie with an extended login expiry time, (or increasing the expiry time in your database if that is how you decide to track it) every time the user hits a new page on your site. That would make it so that someone who was constantly clicking links on your site would not run out of time and find that thir session has ended. -- http://modwest.com PHP/MySQL web hosting On Sat, 12 Apr 2003, daniel wrote: > hi guys , i would like to know how i could check users who are online and who > arent , basically i would like to do the who is online feature, but how can i > tell when they go offline say if they set a cookie ? or when the session ends, > also i would like to use this info to prevent the user being locked out on > multiple logins, i have a bit of a flaw when i am preventing multiple logins , > say i login on one screen, then i login on another screen the first screen > gets logged out, i'd theoretically would want to prevent the second screen to > login , any ideas let me know thanks. > > > >