/**
* Returns the URL to send the user in order to log out of Facebook.
*
* @param FacebookSession $session The session that will be logged out
* @param string $next The url Facebook should redirect the user to after
* a successful logout
*
* @return string
*
* @throws FacebookSDKException
*/
public function getLogoutUrl(FacebookSession $session, $next)
{
if ($session->getAccessToken()->isAppSession()) {
throw new FacebookSDKException('Cannot generate a Logout URL with an App Session.', 722);
}
$params = array('next' => $next, 'access_token' => $session->getToken());
return 'https://www.facebook.com/logout.php?' . http_build_query($params, null, '&');
}
