logout script not working properly.

[kamill]

I have done a logout page for logout from admin section and provides a link to logout from admin section.Wheneve r i clicked on logout link it redirected to index.php of admin section......BU T when i am tring to go back threw back button of Browser....it send me last visted pages(means sessons not expire properly). How can i solve it... One more thing is that the script is working properly on localhost....pr oblem occures when i uploaded it on server.
code of logout is following....
[php]<?phpsession_st art();
if($_SESSION['user_id']!="" && $_SESSION['user_pwd']!="")
{
$_SESSION=array ();
session_unset() ;
session_destroy ();
?>
<script>
window.location .href="index.ph p";
</script>
<?php
}
else
{ ?>
<script>
window.location .href="index.ph p";
</script>
<?php } ?>[/php]
Please enclose any code within the proper code tags. See the Posting Guidelines on how to do that. - moderator

[cassbiz]

Not too familiar with the actual "logout" but I just checked a couple of different scripts that I have and they all call a logout or similar function.

logout();

Here is the function

function logout()
{
    $sql="UPDATE users
    SET UserSession=NULL
    WHERE UserSession='".session_id()."'";
     mysql_query($sql);
}

[Velhari]

Hi,

You are facing the problem after logout, the user presses back button in the browser window it will shows all the pages visited by him/her earlier know.....

This problem can be easily removed by, you can check for the session variable for userid is set in each and every pages..... If suppose this condition is violated means, you have to forward it to the index page.....

Like just for an example...

[PHP]
session_start() ;
if ( $_SESSION['userid']=="" )
header("index.p hp");
[/PHP]

I have done a logout page for logout from admin section and provides a link to logout from admin section.Wheneve r i clicked on logout link it redirected to index.php of admin section......BU T when i am tring to go back threw back button of Browser....it send me last visted pages(means sessons not expire properly). How can i solve it... One more thing is that the script is working properly on localhost....pr oblem occures when i uploaded it on server.
code of logout is following....
///////////////////////////////////////////////////////////////////////////////////////////////////
<?phpsession_st art();

if($_SESSION['user_id']!="" && $_SESSION['user_pwd']!="")
{

$_SESSION=array ();
session_unset() ;
session_destroy ();
?>

<script>
window.location .href="index.ph p";
</script>
<?php

}

else
{ ?>

<script>
window.location .href="index.ph p";
</script>

<?php } ?>

/////////////////////////////////////////////////////////////////////////////////////////////

[kamill]

Hi,

You are facing the problem after logout, the user presses back button in the browser window it will shows all the pages visited by him/her earlier know.....

This problem can be easily removed by, you can check for the session variable for userid is set in each and every pages..... If suppose this condition is violated means, you have to forward it to the index page.....
Like just for an example...
[PHP]
session_start() ;
if ( $_SESSION['userid']=="" )
header("index.p hp");
[/PHP]

i have done it but it working on localhost but not working on server after uploading...my code is like this..
[php]<?php session_start() ;
if($_SESSION['username']=="" && $_SESSION['pwd']=="" )
{
?>
<script> window.location .href="index.ph p";</script>
<?php
}
else
{
rest of the code.....
}[/php]
2nd warning: Please enclose any code within the proper code tags. See the Posting Guidelines on how to do that.

moderator

[kamill]

i am again putting my code in a mannered way.....help me ASAP
[PHP]<?php session_start() ;
if($_SESSION['username']=="" && $_SESSION['pwd']=="" )
{
?>
<script> window.location .href="index.ph p";</script>
<?php
}
else
{
rest of the code.....
}[/PHP]

[kamill]

Please help me as soon as possible......i ts very urgent for me.
thanks in advance....

[kamill]

i am waiting for help....

[Markus]

You have just posted this in a seperate thread.
Dont double post

[Markus]

i am waiting for help....

The session HAS expired, but you're viewing a cached version of the page.
I.E, the browser has stored that page in it's history.

[TheServant]

[PHP]<?php
session_start()
session_destroy ()
?>

{redirect code}[/PHP]

This way it doesn't matter how many variables you have it will get rid of them all. If this doesn't work, it is the browser storing information somehow.

[Markus]

[PHP]<?php
session_start()
session_destroy ()
?>

{redirect code}[/PHP]

This way it doesn't matter how many variables you have it will get rid of them all. If this doesn't work, it is the browser storing information somehow.

Like i already said, the browser stores the page in it's cache so people can use the back button.

[Ravigandha]

Hi everbody,
I have also faced this kind of problem like session working in localhost and not working when uploaded, Now i got solution for this.
I have contact the hosting server and described the issue,then they came to my aid and help me out. The problem was "Due to some permission issue in session directory " that's why we were facing this problem.

The problem I faced and how it is solved i mention it,But i m not an expert!
thanks

[RoninOni]

here is a trick, before sending them to the home page after logout, send them to a redirect.php page which has only
[PHP]<?php
header("locatio n: /index.php");
?>[/PHP]

That way, when they click the back button, its the redirect page which takes them back to the home page this will help resolve the issue of the cached pages, though they can still use the back drop down to go to whatever page they were on, it will make it harder, and many users may nbot realize this option