Logging Out

[godsfshrmn]

Hello all. I have modifed the article from here on user authentication to include cookies so the user does not have to log in each visit of the site. The problem is, I can't figure out how to let them logout. Here is the source code of the two files.

auth.php (included in each file)

<?
session_start();

$uid = isset($_COOKIE['uid']) ? $_COOKIE['uid'] : $_SESSION['uid'];
$pwd = isset($_COOKIE['pwd']) ? $_COOKIE['pwd'] : $_SESSION['pwd'];

$_SESSION['uid'] = $uid;
$_SESSION['pwd'] = $pwd;

$sql = "SELECT * FROM info WHERE charname = '$uid' AND pass = '$pwd'";
$result = mysql_query($sql);
        $r = mysql_fetch_array($result); 
        $pre = $r["premium"];

if (!$result) {
    echo "A database error occurred while checking your login details!";
    echo mainFooter();
    exit;
}

?>

logout.php

<?
    session_start();
    session_unregister('uid'); 
    session_unregister('pwd');
    setcookie ("uid", "", mktime(12,0,0,1, 1, 1990));
    setcookie ("pwd", "", mktime(12,0,0,1, 1, 1990));
    session_destroy(); 
    unset($uid); 
    unset($pwd);

    header("Location: http://www.eqsig.com");
?>

After the logout file redirects me to the homepage, it shows i am still logged in.

[Motivated]

I have not used session up to date but, my guess would be:

   unset($uid); 
    unset($pwd);
$uid="";
$pwd=""; 

    header("Location: http://www.eqsig.com"); 

</FONT>

My guess would be that now you have an answer, if its wrong theres more change of some-one correcting me.

[godsfshrmn]

I think my problem is with the cookies. Logout worked before I added cookies. I think the cookies are not expiring.

[Dylan B]

Also, think about not using short tags

[godsfshrmn]

Whats a short tag?

[Ozzy1987]

<? is short
<?php is full?

[viv5]

How are you setting (creating) your cookies?
Please provide the code.

May be you are taking more parameters (in the setcookie function) while you are setting up your cookies.
Cookies must be deleted with the same parameters as they were set with.

[godsfshrmn]

        $cookie_life = time() + 31536000;
    setcookie('uid', $uid, $cookie_life);
    setcookie('pwd', $pwd, $cookie_life);

///i tried running this code also:
<?
    session_start();
    session_unregister('uid'); 
    session_unregister('pwd');
    $cookie_life = time() - 315360000;
    setcookie ("uid", $uid, $cookie_life);
    setcookie ("pwd", $pwd, $cookie_life);
    session_destroy(); 
    unset($uid); 
    unset($pwd);

    header("Location: http://www.eqsig.com");
?>