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Re: User login status? [message #174503 is a reply to message #174493] Wed, 15 June 2011 05:02 Go to previous messageGo to previous message
Co is currently offline  Co
Messages: 75
Registered: May 2011
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On 15 jun, 00:57, Jerry Stuckle <jstuck...@attglobal.net> wrote:
> On 6/14/2011 4:22 PM, Co wrote:
>
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>> Hi All,
>
>> I have this code that will change one field of the users record when
>> he logs in:
>
>> mysql_query("UPDATE myMembers SET last_log_date=now(), logged='1'
>> WHERE id='$id' LIMIT 1");
>
>> This way we can display all the users who are logged in on the main
>> page.
>> When the user logs of the record will be changed again:
>
>> mysql_query("UPDATE myMembers SET logged='0' WHERE id='$id' LIMIT 1");
>
>> However what if the user just forgets to log off, then he is gone but
>> his status is still logged=1.
>> Is there a way to make sure the user status is changed even when he
>> forgets to log off?
>
>> Marco
>
> The web is stateless - there is no such concept as "logged in" or not.
> And there is no way to know if the user is still reading your page, has
> gone to coffee (or lunch), closed the browser or even shut off the
> computer.  So there is no way to determine how many people are logged in
> or not - and sites which claim to do that are pretty much guessing.
>
> The best you can do is create your own custom session handler which
> stores the data in a database instead of the file system.  Then you can
> assume as long as the session is active, the user is logged in.  When
> the session expires, the user is logged out.  Still not real accurate,
> but the best you can do.
>
> Just a warning - custom session handlers can be complex and pretty much
> beyond what you can do in a newsgroup.
>
> Otherwise, Luuk's response is as good as any.  And it will be about as
> accurate as anything.  You need a cron job to handle the deletion of rows.
>
> --
> ==================
> Remove the "x" from my email address
> Jerry Stuckle
> JDS Computer Training Corp.
> jstuck...@attglobal.net
> ==================

I have been looking at these cron jobs.
I think I have to create these on the server but I haven't been able
to find them there.

Marco
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