Unable To Remove Cookies in codeigniter

dear

problem is this :

when i am not able to reset cookies but there's two ways one way i can do but another way i cannot.

1. i place one link as domain.com/user/logout

when user click on this then i place code

$this->session>un_set('user_id');
delete_cookie('user_id');
redirect('domain.com','refresh');

in this user redirect to this link then move to domain.com but again user login in..

2. when i call domain.com/user/logout from address bar then it do same function but this do all things as per requirement unset session and delete cookies and user logout.

so please let me know why this happen.. i need when user click on logout button then all done.

Thanks
activesoftwareAsked:
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Ray PaseurConnect With a Mentor Commented:
All instances of a browser share the same cookie jar.  So if you test with more than one window open you will get strange results.  Try closing all your browsers, then opening one and only one window to the app and trying it again.

Not specific to codeigniter, but here is a sample logout script.  Read it over - code and comments, and let me know if there is anything you do not understand.

Best, ~Ray
<?php // RAY_logout_example.php
error_reporting(E_ALL);

// MAN PAGE HERE: http://us.php.net/manual/en/book.session.php
// ALWAYS START THE SESSION ON EVERY PAGE
session_start();

// SEE IF THE CLIENT IS ALREADY LOGGED OUT
if (empty($_SESSION["uid"]))
{
    echo "<br/>YOU ARE NOT LOGGED IN \n";
    echo "<br/>CLICK HERE TO <a href=\"RAY_login_example.php\">LOG IN</a>\n";
    die();
}

// SET THE EXPIRATION FOR COOKIES
$cookie_expires	= time() - date('Z') - 60*60*24; // A 24-HOUR DAY IN SECONDS ( = 86,400 )

// CLEAR THE INFORMATION FROM THE $_SESSION ARRAY
$_SESSION = array();

// IF THE SESSION IS KEPT IN COOKIE, FORCE SESSION COOKIE TO EXPIRE
if (isset($_COOKIE[session_name()]))
{
    setcookie(session_name(), NULL, $cookie_expires, '/');
}

// TELL PHP TO ELIMINATE THE SESSION
session_destroy();


// OPTIONAL - CLEAR ALL COOKIES
// foreach ($_COOKIE as $key => $value)
// {
//    setcookie($key, NULL, $cookie_expires, '/');
// }

// OPTIONAL - REDIRECT TO THE HOME PAGE
// header("Location: /");
// exit;


// GIVE THE CLIENT A LINK TO THE LOGIN
echo "<br/>YOU ARE LOGGED OUT\n";
echo "<br/>CLICK HERE TO <a href=\"RAY_login_example.php\">LOG IN</a>\n";

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Ray PaseurCommented:
I object to deleting this question -- it's one that seems to appear a lot, and we should have good answers for it in the EE data base.  

If my response was not helpful, you should post back with a question to clarify.  If my response was helpful, you should award the points.  If you found a completely different answer from a separate source you should post that answer with a code sample to illustrate it, and accept it as the solution.  

Thanks, ~Ray
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_alias99Commented:
Starting the auto-close procedure on behalf of the question asker.

_alias99
Community Support Moderator
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