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  1. #1
    New Coder
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    May 2012
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    Facebook connect logout

    Gidday guys

    Just about implemented the php version of Facebook connect, and have a question re logging a user out when the site is set up for users that have logged in with or without FB.

    My method:

    1. Non-FB users log in, and get a session var set when successful. Same thing with FB users - it's just that their FB id gets checked in mysql, not a username and pass like non-FB users.

    2. Member-only pages now contain a logout url up the top - logout.php - this page basically kills any session data, and then redirects the user to the homepage...
    Code:
    session_start();
    session_regenerate_id();
    $_SESSION = array();
    session_destroy();
    header('Location: https://www.mysite.com/index.php');
    Just getting my head around the correct way to set up logging out now that FB connect is in the mix.

    I have the Facebook logout url for an example session, which is...
    Code:
    https://www.facebook.com/logout.php?next=https%3A%2F%2Fwww.mysite.com%2Fr%2Fmy_facebook_login_logic.php&access_token=AAAEZ...big_long_***_number...
    Should I do it this way...?

    1. Is a user logs in with FB, also set a session var to flag that they have done this eg
    Code:
    $_SESSION['fb'] = true;
    whereas normal member logins are
    Code:
    $_SESSION['fb'] = false;
    2. do something like this on the logout.php page...
    Code:
    session_start();
    session_regenerate_id();
    $_SESSION = array();
    session_destroy();
    
    if($_SESSION['fb'])
    {
    
        header('Location: https://www.facebook.com/logout.php?next=https%3A%2F%2Fwww.mysite.com%2Fr%2Fmy_facebook_login_logic.php&access_token=AAAEZ...big_long_***_number...');
    
    //goes to faccebook, logs user out of app, then redirects to the url I set up in my facebok connect code, which is my homepage
    }
    else
    {
        header('Location: https://www.mysite.com/index.php');
    }
    Is this the general idea (before I go chasing my tail)?

    Thanks for your time and help.

    ps - just one more question re the facebook connect php code (the one you include on your login page) - do I need to include that on all my must-be-logged-in-to-see pages, or would just checking the session var that gets set when a successful login occurs be fine be fine (what I already have in place for the site)? I'm guessing you only need the include FB code on pages where you might need to access FB permitted stuff, like posting to a user's timeline etc
    Last edited by shaunthomson; 12-12-2012 at 04:38 PM.


 

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