Facebook logout with PHP SDK?
Question
This example is actually copied from Facebook.
When I access the page the behavior is strange: The "login" first seems to work fine. Then it displays the 'Logout' link. But when I click it I get the exact same screen again, with the 'Logout' link again. Refresh also gets to the same screen.
Checking with Facebook, however, it DOES logs me out.
If I shut the browser and reopen it, the 'Login' is now correctly displayed.
<?php
require 'facebook.php';
$facebook = new Facebook(array(
'appId' => 'xxxxxxxxxxxxxxx',
'secret' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
));
$user = $facebook->getUser();
if ($user) {
try {
$user_profile = $facebook->api('/me');
} catch (FacebookApiException $e) {
error_log($e);
$user = null;
}
}
if ($user) {
$params = array( 'next' => 'http://xxxxxxxxxx' );
$logoutUrl = $facebook->getLogoutUrl($params);
} else {
$params = array( 'redirect_uri' => 'http://xxxxxxxxxx' );
$loginUrl = $facebook->getLoginUrl($params);
}
?>
<!doctype html>
<html>
<head></head>
<body>
<?php if ($user): ?>
<a href="<?php echo $logoutUrl; ?>">Logout</a>
<?php else: ?>
<a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
<?php endif ?>
<?php if ($user): ?>
Picture = <img src="https://graph.facebook.com/<?php echo $user; ?>/picture">
User Object = <?php print_r($user_profile); ?>
<?php else: ?>
User is not Connected.
<?php endif ?>
</body>
</html>
2 answers
solution1
1 2013-06-10 19:03:58
$past = time() - 3600;
foreach ( $_COOKIE as $key => $value )
{
setcookie( $key, $value, $past, '/' );
}
you can try this code. It will just destroy all cookies saved from your site. Its working for me..!
solution2
0 2014-04-10 10:34:43
Create a file logout.php
<?php
session_start(); //start session
$_SESSION = array(); //clear session array
session_destroy(); //destroy session
?>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Log Out</title>
</head>
<body>
<p>You have successfully logged out!</p>
<p>Return to the <a href="....index.php">Home</a> page</p>
</body>
</html>
And change your code where you check user status
if ($user) {
$params = array( 'next' => 'http://....../logout.php' );
$logoutUrl = $facebook->getLogoutUrl($params);
} else {
$loginUrl = $facebook->getLoginUrl();
}
Use $logoutUrl for logout the user.
<?php if ($user): ?>
<?php echo "Welcome, ".$me['first_name']. " " .$me['last_name'] ." <br />";
echo "Id: " . $me['id'] ." <br />"; ?>
<a href="<?php echo $logoutUrl; ?>"> Logout </a> <br />
<?php else: ?>
<a href="<?php echo $loginUrl; ?>">
<img src="http://static.ak.fbcdn.net/rsrc.php/zB6N8/hash/4li2k73z.gif"> </a>
<?php endif ?>
Hope it will work fine
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