Logout Code

Jun 16, 2007

what code shall i write to logout from the site??? i have a website where i allow the users to access the webpages once they have login.

i want the users to logout on click of a logout hyperlink. if user tries to click on the back button of the browser after logging out it should display session expired.

i have written the code as
session_start();
in all the pages after login

and on click of logout hyperlink the logout.php page opens where the code written is

<?php
session_start();
unset($_SESSION['user']);
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time()-42000, '/');
}
$_SESSION = NULL;
$_SESSION['user']=NULL;
session_destroy();
header("Location: index.php");
?>

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Logout Code Not Executing At All?

Feb 28, 2010

Here is the codeI dont know whats wrong with it.

<?php
//Logout code
//Starting Session

[code]...

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Aug 8, 2006

Basically, i want a link to login/register IF the person isnt logged in, but if they are logged in i want it to show a link to log out.

So basically, if you are logged out, login/register will show. If you are logged in, logout with show.

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Html - How To Create A Logout Code

Jan 25, 2010

i'm using this code: but doesnt seem to work because the structure of my html file has 3 frames, a sidebar, title, and the main.

Now, the user will have two buttons, the call new sidebar. Which is only accessible if he has logged in. And the other button is log out. When the user press the call new sidebar. The sidebar will change into a user-only sidebar. Now, when the user clicks the logout button the sidebar which is only for users is still there. Is it possible to target two frames in html. Any other technique that you can recommend so that when the user logs off. There will be no other way to access the user-only sidebar.

session_start();
session_destroy();
?>

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Apr 4, 2011

I started using codeigniter for my project. I have user authentication system for my website. I have seen the videos from nettuts for the login information. I am confused why the logout is not working properly. I have the following logout function in my login controller.

function logout() {
$this->session->sess_destroy();
redirect('main');
}

If I click on the logout button I am redirecting the user to the main page. But after redirecting the user to the main page, if click on the back button on the browser I will see the logoff and my name on the top of the page. I need some help on where I am going wrong or is there any important piece of code I am missing in my controller I think I found the solution. I should append the following code into the appropriate controller

$this->output->set_header("Cache-Control: no-store, no-cache, must-revalidate, no-transform, max-age=0, post-check=0, pre-check=0");
$this->output->set_header("Pragma: no-cache");

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I am having problems understanding the reason for why the user has to click logout twice, here's the bulk of the code:

<?php
ini_set('display_errors',0);
require_once'header.html';
require_once'db.functions.php';
require_once'config.php';

[Code].....

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Jul 31, 2007

For some reason I am able to run my login script which after doing so will put more options into my menu to allow me to do other things. Well one option it brings up of course is "logout". Well for some reason it doesnt logout. I dont know if you will need more info but this is my log out script, I cant seem to see where the issue is. Code:

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Need Help With Logout (logout Not Perfect)

Oct 30, 2006

I've written a login/logout code. It does what it's supposed to do but
the problem is when I logout and press browser's back button (in
Firefox), I get to the last login page. In IE, when I press back
button, I get to the page that says "Page has Expired" but Firefox does
not do this.

I think it's something to do with sessions not properly unset or
something like that but I haven't been able to figure it out. I am
attaching my codes and database structure below. If you need more info,
please email me. I really want this to be fixed asap. I've played with
this long enough.

-----------------

class Login {
//var $loginflag;
//var $db_connect;

function Login() {
//$this ->db_connect = $db_connect;

if (!isset($_SESSION['uid']) || $_SESSION['uid'] == 0) {
$this->set_session_defaults();
echo "inside login class<br />";
}
}

function check_login($username, $password) {
global $db;
$link=$db->connectDB();

if ($_SESSION['logged']) {
$this->check_session();
echo "logged...<br />";
return true;
} else {
$username = mysql_escape_string($username);
$query = "SELECT * FROM users WHERE username = '$username' AND
AES_DECRYPT(password, 'dreamfilmslogin438ismbtsx') = '$password'";
$result = mysql_query($query, $link) or die("Could not select");

if (mysql_num_rows($result)) {
$this->set_session($username = mysql_fetch_assoc($result), true);
return $username['username'];
} else {
$this->failed = true;
session_destroy();
return false;
}
}
}

function check_session() {
global $db;
$link=$db->connectDB();

$username = mysql_escape_string($_SESSION['username']);
$token = mysql_escape_string($_SESSION['token']);
$session = mysql_escape_string(session_id());
$ip = mysql_escape_string($_SERVER['REMOTE_ADDR']);

$query = "SELECT * FROM users WHERE username='{$username}' AND
token='{$token}' AND session='{$session}' AND ip='{$ip}'";
$result = mysql_query($query, $link) or die("Could not select");
echo "check session:<br />";
print_r($result);
echo "<br />";
if ($result != false) {
} else {
$this->logout();
}
}

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Apr 13, 2006

How I can introduce in this line:

<span class="destqwhit">
<a href="alt_pass.php">Alterar Password</a> |
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</span>

the next PHP function for logout

//LOGOUT FORM
if($_POST["logout"] != "")
{
session_destroy();
echo "<meta http-equiv="refresh" content="0;URL=index.php">";
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Dec 8, 2000

when i use the session, i will generate a key "SID" in URL to check the session.

for example, http://abc.com/test_session.php?SID...46d4a230468fa7a

After I had run the logout script, and then go back the previous page, the session will still here! how to solve it? pls help me!!!

for example,
----- logout script ------
session_start();
session_unset();
session_destroy();
--------------------------

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May 25, 2001

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Jan 6, 2001

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Jul 11, 2001

Im trying to setup a user authentication by myself. So far... I create a session at the top. Register 3 session variables. (user, pass, status <-- logged in or not). And then check to see if user and pass are in the database. If they are... status gets switched to true.

The next thing... I would like to setup.. is logging out. I dont have much experience with Sessions... so I dont know how they work that much. But so far it seems like... if you declare a session variable... it will stay in the variable for a while :P

Well I was wondering if there was a way... to reset the session variables? So if someone clicks LOGOUT.... the 3 session variables are reset to noting.

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Jul 17, 2005

I have created a web in the 1st page. User can login. After login i start the session and save it in his db-record. Also the page give a link to my important page. In that page I check the saved sid and current sid. If both are equal, it will display some details, that page have the logout link.when user click that link. The logout.php will work. It generate a new sid for the
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Jan 1, 2007

I am having an issue with this as once an individual is logged in it will not logout, even when clicking the Logout link. Here is my code for the logout: PHP Code:

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// If no first_name variable exists, redirect the user.
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Feb 22, 2006

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The code... ['logout.php']

<?

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Sep 2, 2006

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I am using the following code which executes when ‘log out’ link is clicked: Code:

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When I login, i have two sessions stored and two cookies(for the remember me feature). So when I click on logout I terminate the cookies, and kill the sessions, but when I go back to the index the part of the script that is to be shown when a user is logged in shows and the part that is to be shown when a user is not logged in. Maybe I'm not terminating correctly? I'm not sure but here's the code:

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Oct 17, 2007

i have the login all set up and im trying to add a logout option however its not working lol

this is what i have

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now on logout.php i would have thought it would be something like...

<?
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session_unregister("mypassword");
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?>

It echos the "you are now loged out." but it doesnt actualy log you out. Any ideas of what im doing wrong?

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May 19, 2007

I do not know why. Here is the script that keeps user's from viewing unless they are logged in!

<?php
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Jul 12, 2007

I have used the following code for a logout page but when I click the logout button the session variables are still on scope.

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Aug 18, 2010

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Jul 17, 2005

I've searched the web for hours trying to figure out this problem and
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I'm using PHP 5 with IIS 6.

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