logout probem

[martinb7]

hi, i have a login system so that when someone logs in it updates a mysql table to 'yes' instead of 'no'. and when you log out it does the opposite. That all works fine.

my problem is that if they shut the window, it will still be logged in as yes, how wud i make it change to no if the window is shut?

Any ideas??

Thanx

Martin

http://webrevolt.tycooneden.com/

 

[sleipnir214]

You can't make it change to no if the browser is shut.

Keep in mind that a web app is a discontinuous set of individual conversations. Once a web page is streamed to a browser, the conversation that included that stream ends.

If a user closes the browser, there is no connection between the server and the browser. It's just so happens that the browser is displaying a copy of the data sent by the server.

You can try some JavaScript or VBScript to invoke a page on browser shutdown, but that's very browser-dependent and not guaranteed to work.

I recommend that you implement some kind of garbage collection. Put a time-date stamp column on your user table and update the user's record every time he does something. Then have a script, invoked by your site's script pages, set the login status to "n" for all users that haven't done anything over a certain amount of time.

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[martinb7]

i am using sessions. and my friend has done it but he wont tell me how to do it as we're rivals.

Anybody else know??

Thanx

Martin

http://webrevolt.tycooneden.com

 

[martinb7]

i could do that but im very week on the time() function and don't understand it fully. anyone like to give me some code with comments??

thanx

Martin

http://webrevolt.tycooneden.com

 

[sleipnir214]

I have a FAQ in this forum which talks about custom session code: faq434-2037

You might be able to make use of the session garbage collection mechanism to automatically log out users.

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[martinb7]

is it possible to create a session that lasts for an hour and when an hour has passed, the session disapears??

thanx

Martin

http://webrevolt.tycooneden.com

 

[sleipnir214]

Yes. By default, the session cookie has an expiration of 0, which means the cookie exists until the browser is next closed.

See session.cookie_lifetime in your php.ini

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[sleipnir214]

Keep in mind, however, this is not a deterministic way of locking out a user. A user can dump his cookie store (or in some browsers, delete any single cookie) any time he wants.

I which case, your site will let him vote again. With PHP and CURL I could write a script that would vote in your poll 10000 times an hour.

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