how to create session in php with mongodb - php

Question

in node.js i will create mongodb session like this.
app.configure(function()
{
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.cookieParser());
app.use(express.session({
secret: 'MY SECRET',
store: new MongoStore({
db: 'MY SESSION DB',
host: 'localhost',
port:88888
})
}));
app.use(everyauth.middleware());
app.use(express.methodOverride());
app.use(app.router);
});
how to create session with mongodb in php.i am new one for php..i want to create session with mongodb in php(webserver: apache),so let me know how to create

Answer 1

You must use a session handler to accomplish this. Normally we don't answer these sort of questions which lack research of any kind but, this one time, here is a small, extremely simple, self contained edition I have:
class Session{
public $db;
/**
* This decides the lifetime (in seconds) of the session
*
* #access private
* #var int
*/
public $life_time='+2 weeks';
/**
* This stores the found session collection so that we don't
* waste resources by constantly going back for it
*
* #access private
* #var sessions
*/
private $_session = array();
/**
* Constructor
*/
function open() {
// Ensure index on Session ID
$this->db->sessions->ensureIndex(array('session_id' => 1), array("unique" => true));
// Register this object as the session handler
session_set_save_handler(
array( $this, "openSession" ),
array( $this, "closeSession" ),
array( $this, "readSession" ),
array( $this, "writeSession"),
array( $this, "destroySession"),
array( $this, "gcSession" )
);
session_start(); // Start the damn session
}
/**
* Open session
*
* This function opens a session from a save path.
* The save path can be changed the method of opening also can
* but we do not change that we just do the basics and return
*
* #param string $save_path
* #param string $session_name
*/
function openSession( $save_path, $session_name ) {
global $sess_save_path;
$sess_save_path = $save_path;
// Don't need to do anything. Just return TRUE.
return true;
}
/**
* This function closes the session (end of session)
*/
function closeSession() {
// Return true to indicate session closed
return true;
}
/**
* This is the read function that is called when we open a session.
* This function attempts to find a session from the Db. If it cannot then
* the session class variable will remain null.
*
* #param string $id
*/
function readSession( $id ) {
// Set empty result
$data = '';
// Fetch session data from the selected database
$time = time();
$this->_sessions = $this->db->sessions->findOne(array("session_id"=>$id));
if (!empty($this->_sessions)) {
$data = $this->_sessions['session_data'];
}
return $data;
}
/**
* This is the write function. It is called when the session closes and
* writes all new data to the Db. It will do two actions depending on whether or not
* a session already exists. If the session does exist it will just update the session
* otherwise it will insert a new session.
*
* #param string $id
* #param mixed $data
*
* #todo Need to make this function aware of other users since php sessions are not always unique maybe delete all old sessions.
*/
function writeSession( $id, $data ) {
//Write details to session table
$time = strtotime('+2 weeks');
// If the user is logged in record their uid
$uid = $_SESSION['logged'] ? $_SESSION['uid'] : 0;
$fields = array(
"session_id"=>$id,
"user_id"=>$uid,
"session_data"=>$data,
"expires"=>$time,
"active"=>1
);
$fg = $this->db->sessions->update(array("session_id"=>$id), array('$set'=>$fields), array("upsert"=>true));
// DONE
return true;
}
/**
* This function is called when a user calls session_destroy(). It
* kills the session and removes it.
*
* #param string $id
*/
function destroySession( $id ) {
// Remove from Db
$this->db->sessions->remove(array("session_id" => $id), true);
return true;
}
/**
* This function GCs (Garbage Collection) all old and out of date sessions
* which still exist in the Db. It will remove by comparing the current to the time of
* expiring on the session record.
*
* #todo Make a cronjob to delete all sessions after about a day old and are still inactive
*/
function gcSession() {
$this->db->sessions->remove(array('expires' => array('$lt' => strtotime($this->life_time))));
return true;
}
}
Which can be called like so:
$session = new Session;
$session->db=$mongo->my_db;
$session->open();
It is a very basic example of how to do this.
Afterwards you can just use it like a normal session like so:
$_SESSION['user_id'] = $id;