Posted by forje on 09/24/06 21:27

Gordon Burditt a écrit :
>> How to make a session "exclusive"? When one attempts to open a new
>> session either he's warned and asked to wait or any other openned
>> session is closed.
>
> If a session is already open, PHP generally just uses that session
> and does not try to open another one.
It is a particular application: a remote interface to administrate a
system. The idea is to prevent concurrent access to the system. Stop on
one side, start on an other...

>> The need is to force only one user at the same time.
>
> Since there are plenty of ways to leave a session without informing
> PHP of that, this is going to be a severe problem. You can time
> out sessions but that can be very annoying to your users. Indefinite
> lockouts are even worse.
>
In this case, a direct close of any other openned session would not be a
problem.

>> I'm currently using the database but also looking at a php only solution.
>
> There really isn't a good solution, period, unless allowing a user
> a maximum of zero sessions is acceptable.
PHP does not give a client the direct knowledge of the existence of
other connections. That's why I use the db for the moment.

[Back to original message]