clearing history using php

[adityamadhira]

Hi

I want to clear back button history in browser after log out in php

Thanks in advance

I don't think that's possible. I'd be furious if a website could take control of my browser and delete stuff.

[pritaeas]

It won't be possible in PHP anyway, because it runs on the server, and not in the browser.

What is your specific problem? sessions not clearing data on logout?

[rajesh1158]

In the logout script, use unset(name_of_session_variable) to invalidate session. Plus, in all pages, before displaying the output, use an if condition and check if the session variable exists.

Example: in logout script,

unset ( $_SESSION ['name'] );

In all other pages, 
    if(isset($_SESSION['name']))
    {
        //display data
        echo "success";
    }
    else
    {
        //redirect to homepage/index page
        header('Location: /index.php');
    }