PHP Session gets destroyed after redirection? - php

Question

I am facing a very strange problem , i am doing CasLogin in my application..
i have successfully implemented CAS, i.e all values are set in $_SESSION variable after all proper validations, and successful login, but when i redirect it from CasLogin() action to Index Action $_SESSION contains nothing..
i am using Yii Frame Work.
here is code.
public function actionCasLogin($CID=NULL)
{
//code to be imported from GMS here
PhpCasControl::setPhpCasContext($CID);
phpCAS::setPostAuthenticateCallback(array($this,'_saveServiceTkt'));
$loginForm = new CasLoginForm;
// validate user input and redirect to the previous page if valid
if ($loginForm->login($CID)) {
if (Yii::app()->user->isGuest){
echo '<br> <br> This shows up..';
var_dump($_SESSION);
}
else{
echo 'Hello at caslogin <br>never shows up';
var_dump(Yii::app()->user->id);
}
$this->redirect(array('index'));
}
else {
throw new Exception("You don't have sufficient permissions to access this service. Please contact Administrator !");
}
}
this function Works Properly and if i put a EXIT; here it will display $_SESSION with all the desired values..
but after redirection... to index..
whose code is this..
public function actionIndex()
{
echo"hello at index";
if (! Yii::app()->user->isGuest) {
//#CASE 1: User is already logged in
$this->redirect(array("site/upload"));
}
else{
//#CASE 2: User is not Logged in
echo '<br>shows up with empty session<br>';
var_dump($_SESSION);
var_dump(Yii::getVersion());
exit;
$this->redirect(array("site/login"));
}
}
here $_SESSION is empty..
any explanation why this might be happening..
i am aware of CAS creating its own session by service ticket name.. i have handled that thing.. by RenameSession function, which i call in CasLoginForm..
whose code is this..
public function rename_session($newSessionId) {
//Store current session variables so that can be used later
$old_session = $_SESSION;
//Destroy current session
session_destroy();
// set up a new session, of name based on the ticket
$session_id = preg_replace('/[^a-zA-Z0-9\-]/', '', $newSessionId);
//start session with session ID as 1) service ticket in case of CAS login, 2) random sTring in case of local login.
session_id($session_id);
session_start();
//echo "<br>new session <br>";
//Restore old session variables
$_SESSION = $old_session;
//var_dump($_SESSION);
}

Answer 1

OK, i think that you should use session_id to change the id.
public function rename_session($newSessionId) {
// set up a new session id, of name based on the ticket
session_id(preg_replace('/[^a-zA-Z0-9\-]/', '', $newSessionId));
}