HTMLHelp Forums > PHP cookie handling in I.E.

Full Version: PHP cookie handling in I.E.

HTMLHelp Forums > Programming > Server-side Scripting

kryles

Apr 7 2008, 09:51 AM

Hi,

I created a login that allows a user to set a cookie. Then when they logout it destroys the cookie (and session variables). I also have a profile page that checks if the cookie is set, if not you get an error message saying you aren't logged in and if it is displays profile info.

I've done the following which results in differently in IE and Mozilla.

1)Login and choose remember (cookie is set).
2)Logout.
3)Go to profile page.

Mozilla gives an error message (as it should) and IE displays the users profile (gah!).

CODE

/* functions */

function checkUserCookie($refreshTo, $refresh)
{
    if(isset($_COOKIE['USER']) && isset($_COOKIE['PASS']))
    {
        /*     Cookie is found, check ID and password
            If both match set SESSION variables
            and continue to Index
                                                    */

        $safe_id = mysql_real_escape_string(trim(strip_tags($_COOKIE['USER'])));
        $safe_pass = mysql_real_escape_string(trim(strip_tags($_COOKIE['PASS'])));

        $query = "    SELECT count(*)
                    FROM Customers
                    WHERE custID = '".$safe_id."' AND custPassword = '".$safe_pass."'";

        $result = mysql_query($query);

        $count = mysql_result($result,0,0);

        if($count == 1)
        {
            $_SESSION['auth'] = true;
            $_SESSION['userID'] = $safe_id;

            if($refresh === true)
            {
                header( "Location: ".URL."/".$refreshTo."");
                die();
            }
        }
    }
}

CODE

/* login */
session_start();
session_cache_limiter('none');

if($_GET['action'] == "login")
{
/* ..... validation and setting session variables here ... */
    if(isset($_POST['remember']))
    {
        setcookie("USER",$_SESSION['userID'],time()+(21 * 24 * 60 * 60),'/');
        setcookie("PASS",$password,time()+(21 * 24 * 60 * 60),'/');
    }
}

CODE

/* index */

session_start();
session_cache_limiter('none');

if($_GET['action'] == "logout")
{
    setcookie('PASS','',time() - 60*60);
    setcookie('USER','',time() - 60*60);
    session_destroy();
    header('Location: url/login.php');
}

CODE

/* Profile.php */

session_start();
session_cache_limiter('none');

checkUserCookie("", false);

I've omitted code obviously, but any idead why it would work for one and not the other?

Darin McGrew

Apr 7 2008, 11:34 AM

It's just a guess, but maybe MSIE sees a cookie that expired an hour ago, and just ignores it without checking whether it corresponds to an existing unexpired cookie.

kryles

Apr 7 2008, 11:45 AM

isn't setting a negative expire time the way to delete a cookie though? How else should I try it, setting the cookie to false maybe

Brian Chandler

Apr 7 2008, 02:14 PM

QUOTE(kryles @ Apr 8 2008, 01:45 AM)

isn't setting a negative expire time the way to delete a cookie though? How else should I try it, setting the cookie to false maybe

Don't know. But can I assume you've read http://jp2.php.net/manual/en/function.setcookie.php ??

Ephraim F. Moya

Dec 8 2010, 04:49 PM

There is NO cache_limiter( 'none' )

cache_limiter is supposed to be BEFORE the start.

Have you thought about whether either browser is set to forget cookies when offline?

Why use sessions AND cookies? Pick one and stick with it.

All header info MUST be set before the page is sent. Can't tell from your postings whether you're doing that or not.

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