Re: close the browser

On 24 June 2014 18:18, hadi <almarzuki2011@hotmail.com> wrote: > >I get that, but why do you want to run a script? Based on your previous > >emails it looks like you're trying to manually expire a session. Sessions > >usually expire due to a timeout since the last request, and I've never > >come > >across a reason to do it any other way. So again, what is it that you are > >actually trying to achieve? > > >If you want to apply a more complicated set of session expiry rules you > can > >do so with a custom session handler, but I would question the need for > such a > >thing. > > Well im trying to achieve one thing here. If a user is logged in and if he > try to logged in again from different pc with the same username/password it > well flag him out. Because he already logged in. > About connection close, when the user close the connection it well clear > the > flag. > So what do I use to accomplish this ? I would start with a custom session handler. Possibly something similar to this: http://3ft9.com/mysql-sessions/ Modify the methods that write the data to MySQL so it first extracts the username and stores that in a separate field so you can do lookups on that. Set the lifetime to something relatively short (say 60 seconds), then have a webpage that the user must keep open that is making a request to the server at roughly half that interval (e.g. every 30 seconds). Modify the Session::gc method so it does what's necessary to cleanup the network config when a session expires. Add a method so your login system can query the session store for existing users with that username, or alternatively modify the Session::write method to refuse to store a session if there's already a session for that username. Using a timeout rather than trying to detect when the user closes their browser is preferable primarily due to the unreliability of that detection. A number of browsers have rules around the use of the onunload event that may prevent you from seeing a particular user disconnect. Personally I would be looking in to implementing this at the network level rather than PHP. The network must be able to detect when a device drops off the network, and that would probably be a better place to implement the cleanup. -Stuart -- Stuart Dallas 3ft9 Ltd http://3ft9.com/