Php logout issue

PHP
1

Hi

I have written a logout script to clear the session vars and forward to another page see below:

session_start();
session_unset();
session_destroy();
session_write_close();
setcookie(session_name(),‘’,0,‘/’);
session_regenerate_id(true);
include (“user-includes/mma-config.php”);
GoToAdminLogin();
exit();

On one hand it seems to work, however if I press the back button in the browser I can still get to a page
I shoulnd’t be able to access since I’m suppose to be logged out.

How do I fix this?

2

That is a caching issue, you can tell the browser not to cache that page using [fphp]header[/fphp] (search for no-cache or cache expiration).

You should see that since you are logged out, refreshing the page or submitting a form should redirect you to a login page.

3

It is loaded from the browser cache… but they may not be able to take action on page.? are they able to do it?

Have a session variable at the start of page and check if it is isset and they redirect to login page. ( this will take care if the page is reloaded fresh)

4

Hi
Yes they are able to perform an action on a page they are supposed to be logged out of

Here is my code at the top of 1 page: - now that I look at it, I should be replacing session_start(); with a forward to a login page?

if ((!isset($_SESSION[‘user’])) || (!isset($_SESSION[‘role’])) || (!isset($_SESSION[‘active’])))
{
session_start();
}

if ((isset($_SESSION[‘user’])) || (isset($_SESSION[‘role’])) || (isset($_SESSION[‘active’])))
{
if (($_SESSION[‘role’] != “admin”) || ($_SESSION[‘role’] != “ltd”))
{
include (“…/user-includes/mma-config.php”);
$_SESSION[‘error’] = “You are not authorized to access this area.”;
GoToOops();
exit();
}
if ($_SESSION[‘active’] != “Y”)
{
include (“…/user-includes/mma-config.php”);
$_SESSION[‘error’] = “You are not authorized to access this area.”;
GoToOops();
exit();
}
}

5

This is enough to remove the session session_destroy();

Are you having login credentials in session. Is credentials validated on each page? it depends on how you had implemented the code.

6

Hi

The login creds are validated on each page.

However, I am unsure if I doing the coding correctly.