I am implementing a simple session manager with PHP and MongoDB.
But somehow the $_SESSION is empty on next page, assigned value on first page though..
class SessionManager
{
//name of collection where sessions will be stored
const COLLECTION = 'sessions';
//Expire session after 10 mins in inactivity
const SESSION_TIMEOUT = 600;
//Expire session after 1 hour
const SESSION_LIFESPAN = 3600;
//name of session cookie
const SESSION_NAME = 'mongosessid';
const SESSION_COOKIE_PATH = '/';
const SESSION_COOKIE_DOMAIN = '';
private $_mongo;
private $_collection;
//Represent the current session
private $_currentSession;
function __construct()
{
$this->_mongo = DBConnection::instantiate();
$this->_collection = $this->_mongo->getCollection(SessionManager::COLLECTION);
session_set_save_handler(
array(&$this, 'open'),
array(&$this, 'close'),
array(&$this, 'read'),
array(&$this, 'write'),
array(&$this, 'destroy'),
array(&$this, 'gc')
);
//Set session garbage collection period
ini_set('session.gc_maxlifetime', SessionManager::SESSION_LIFESPAN);
//Set session cookie configurations
session_set_cookie_params(
SessionManager::SESSION_LIFESPAN,
SessionManager::SESSION_COOKIE_PATH,
SessionManager::SESSION_COOKIE_DOMAIN
);
//Replace 'PHPSESSID' with 'mongosessid' as the
// session name
session_name(SessionManager::SESSION_NAME);
session_cache_limiter('nocache');
register_shutdown_function('session_write_close');
// start the session
session_start();
}
public function open($path, $name)
{
return true;
}
public function close()
{
return true;
}
public function read($sessionId)
{
$query = array(
'session_id' => $sessionId,
'timedout_at' => array('$gte' => time()),
'expire_at' => array('$gte' => time() - SessionManager::SESSION_LIFESPAN)
);
$result = $this->_collection->findOne($query);
$this->_currentSession = $result;
if (!isset($result['data'])) {
return '';
}
return $result['data'];
}
public function write($sessionId, $data)
{
// $expired_at = time() + self::SESSION_TIMEOUT;
$new_obj = array(
'data' => $data,
'timedout_at' => time() + self::SESSION_TIMEOUT,
'expired_at' => (empty($this->_currentSession)) ?
time() + SessionManager::SESSION_LIFESPAN
: $this->_currentSession['expired_at']
);
$query = array('session_id' => $sessionId);
$this->_collection->update(
$query,
array('$set' => $new_obj),
array('upsert' => true)
);
return true;
}
public function destroy($sessionId)
{
$this->_collection->remove(array('session_id' => $sessionId));
return true;
}
public function gc()
{
$query = array('expired_at' => array('$lt' => time()));
$this->_collection->remove($query);
return true;
}
}
// initiate the session
$session = new SessionManager();
Next i have created 2 new scripts to test this sessionManager
Mongo_session1.php
<?php
// Session started by requiring the script
require('session.php');
// Generate random number
$random_number = rand();
//Put the number into session
$_SESSION['random_number'] = $random_number;
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="css/style.css"/>
<title>Using SessionManager ... Page 1</title>
</head>
<body>
<p> Random number generated
<span style="font-weight: bold">
<?php echo $_SESSION['random_number']; ?>
</span>
</p>
<p>
PHP session id
<span style="text-decoration: underline">
<?php echo session_id(); ?>
</span>
</p>
<a href="mongo_session2.php">Go to Next page</a>
</body>
</html>
Mongo_session2.php
<?php
// Session started by requiring the script
require('session.php');
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="css/style.css"/>
<title>Using SessionManager ... Page 2</title>
</head>
<body>
<h2>Using the SessionManager.. Page 2</h2>
<p>The random number generated in previous page is still
<span style="font-weight: bold">
<?php
echo "<pre>";
print_r($_SESSION);
echo "</pre>";
?>
</span>
</p>
<p>
PHP session id
<span style="text-decoration: underline;">
<?php echo session_id(); ?>
</span>
</p>
</body>
</html>
If you had faced the same problem before, and got the solution for that, it would be very helpful for me to learn the MongoDB and PHP web development. Thank you in advance.
