Matijn Woudt <tijnema@xxxxxxxxx> wrote:
>On Sun, Aug 4, 2013 at 4:00 PM, Ashley Sheridan
><ash@xxxxxxxxxxxxxxxxxxxx>wrote:
>
>>
>>
>> Farzan Dalaee <farzan.dalaee@xxxxxxxxx> wrote:
>> >
>> >
>> >> On Sun, 2013-08-04 at 14:56 +0430, Farzan Dalaee wrote:
>> >>>
>> >>> You mean when user logged in i add new record to table and when
>> >logged out i delete the row? So if user close the browser without
>> >logout how can i find user is online or not?
>> >>>
>> >>> Sent from my iPhone
>> >>>
>> >>> On Aug 4, 2013, at 14:44, Matijn Woudt <tijnema@xxxxxxxxx> wrote:
>> >>>
>> >>> >
>> >>> >
>> >>> >
>> >>> > On Sun, Aug 4, 2013 at 11:02 AM, Farzan Dalaee
>> ><farzan.dalaee@xxxxxxxxx> wrote:
>> >>> >> hi
>> >>> >> i want to write online user module for my site and i want to
>> >check
>> >>> >> $_SESSION['userID'] to find all users id who loged in
>> >>> >> but when i echo this code its return only current user detail
>> >>> >> how i can see all sessions?
>> >>> >>
>> >>> >> foreach($_SESSION as $k => $v)
>> >>> >> {
>> >>> >> echo $k."----------".$v;
>> >>> >> }
>> >>> >> or how i handle online users?
>> >>> >
>> >>> > You can only access sessions when you know the session id.
>> >>> > Most sites handle online users in their database, store a
>> >timestamp each time a user loads a page. When you want to display
>the
>> >online users, check where the timestamp is between now and a few
>> >minutes ago. Note that without javascript (or flash/java/etc) there
>is
>> >no way to truly know if the user left or not. The session will stay
>> >active for a long time, depending on your php.ini settings.
>> >>> >
>> >>> > - Matijn
>> >>> >
>> >>
>> >> Like Matijn said, unless you're using some kind of client-side
>method
>> >to continually poll the server, you can't know if they've just
>closed
>> >their browser. There are Javascript events for exiting a page, but
>they
>> >don't work correctly on Safari and iOS Safari.
>> >>
>> >> You don't have to actually save anything to the DB manually, just
>> >instruct PHP to use the DB for its own sessions, rather than files.
>> >>
>> >> Do you really need to inspect each visitors session in detail, or
>do
>> >you just need a way to determine how many unique visitors are on the
>> >site at any one time?
>> >>
>> >> Thanks,
>> >> Ash
>> >> http://www.ashleysheridan.co.uk
>> >>
>> >>
>> >>
>> >
>> >
>> >I need to inspect each visitor to show how online or who offline for
>> >chat
>> >Like facebook chat
>> >>
>>
>> Ah, so you don't need to see the details of the sessions then.
>Facebook
>> does this (badly) by using javascript on the client side which
>triggers an
>> update of a timestamp on the server, which then allows you to
>determine who
>> is online (or was within a given time limit)
>> Thanks,
>> Ash
>>
>
>Maybe it's bad, but there's no good alternative, except sending ping
>requests to your server every second or so, but any site as large as
>Facebook will DDOS itself when using things like that ;)
>
>- Matijn
I'm not saying the method is bad, but the way Facebook does it isn't great, I'm constantly seeing people online who "sign out" when I open up a message box. Now that might be genuine, but I'm not *that* unpopular!
Thanks,
Ash
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