How to save and extract session data in codeignite

问题:

I save some data in session on my verify controller then I extract this session data into user_activity model and insert session data into activity table. My problem is only username data saved in session and I can get and insert only username data after extracting session on model. I am new in Codeigniter. For this reason It’s very difficult to find out the problem. I am trying several days finding the problem. But unfortunately I can’t. So please, anyone help me. Thanks

VerifyLogin controller:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
session_start();
class VerifyLogin extends CI_Controller {

 function __construct()
 {
   parent::__construct();
   $this->load->model('user','',TRUE);
   $this->load->model('user_activity','',TRUE);
  }

 function index()
 {
   //This method will have the credentials validation
   $this->load->library('form_validation');

   $this->form_validation->set_rules('username', 'Username', 'trim|required|xss_clean');
   $this->form_validation->set_rules('password', 'Password', 'trim|required|xss_clean|callback_check_database');

   if($this->form_validation->run() == FALSE)
   {
     //Field validation failed.  User redirected to login page
     $this->load->view('login_view');
   }
   else
   {
     //Go to private area
     redirect('home', 'refresh');
   }
 }

 function check_database($password)
 {
   //Field validation succeeded.  Validate against database
   $username = $this->input->post('username');
   $vercode = $this->input->post('vercode');

   //query the database
   $result = $this->user->login($username, $password);

   // ip address
   $ip_address= $this->user_activity->get_client_ip();

   //Retrieving session data and other data
   $captcha_code=$_SESSION['captcha'];
   $user_agent=$_SERVER['HTTP_USER_AGENT'];

   if($result && $captcha_code == $vercode)
   {
     $sess_array = array();
     foreach($result as $row)
     {
       $sess_array = array(
         'username' => $row->username,
           'user_agent' => $row->user_agent,
           'ip_address' => $row->ip_address,
       );
       $this->session->set_userdata('logged_in', $sess_array);

        //insert user activity
       $this->user_activity->activity();
     }
     return TRUE;
   }
   else
   {
     $this->form_validation->set_message('check_database', 'Invalid username or password');
     return false;
   }
 }
}
?>

user_activity model:

    <?php
    Class User_activity extends CI_Model
    {
     function activity()
     {
        if($this->session->userdata('logged_in'))
       {
         $session_data = $this->session->userdata('logged_in');
       //  $data['username'] = $session_data['username'];

           $data = array(
                  'session_id'=>"",
                  'ip_address'=>$session_data['ip_address'],
                  'user_agent'=>$session_data['user_agent'],
                  'username'=>$session_data['username'],
                  'time_stmp'=>Now(),
                  'user_data'=>$session_data['username']."Logged in Account"
                );
        $this->db->insert('user_activity',$data);        
       }
       else
       {
          return  false;
       }

       // Function to get the client ip address
    function get_client_ip() {
        $ipaddress = '';
        if ($_SERVER['HTTP_CLIENT_IP'])
            $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
        else if($_SERVER['HTTP_X_FORWARDED_FOR'])
            $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
        else if($_SERVER['HTTP_X_FORWARDED'])
            $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
        else if($_SERVER['HTTP_FORWARDED_FOR'])
            $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
        else if($_SERVER['HTTP_FORWARDED'])
            $ipaddress = $_SERVER['HTTP_FORWARDED'];
        else if($_SERVER['REMOTE_ADDR'])
            $ipaddress = $_SERVER['REMOTE_ADDR'];
        else
            $ipaddress = 'UNKNOWN';

        return $ipaddress;
       }
      }
    }
    ?>

回答1:

You can set data to session simply like this in Codeigniter:

$this->load->library('session');
$this->session->set_userdata(array(
    'user_id'  => $user->uid,
    'username' => $user->username,
    'groupid'  => $user->groupid,
    'date'     => $user->date_cr,
    'serial'   => $user->serial,
    'rec_id'   => $user->rec_id,
    'status'   => TRUE
));

and you can get it like this:

$u_rec_id = $this->session->userdata('rec_id');
$serial = $this->session->userdata('serial');

回答2:

First you have load session library.

$this->load->library("session");

You can load it in auto load, which I think is better.

To set session

$this->session->set_userdata("SESSION_NAME","VALUE");

To extract Data

$this->session->userdata("SESSION_NAME");

回答3:

initialize the Session class in the constructor of controller using

$this->load->library('session');

for example :

 function __construct()
   {
    parent::__construct();
    $this->load->model('user','',TRUE);
    $this->load->model('user_activity','',TRUE);
    $this->load->library('session');
   }

回答4:

CI Session Class track information about each user while they browse site.Ci Session class generates its own session data, offering more flexibility for developers.

Initializing a Session

To initialize the Session class manually in our controller constructor use following code.

Adding Custom Session Data

We can add our custom data in session array.To add our data to the session array involves passing an array containing your new data to this function.

$this->session->set_userdata($newarray);

Where $newarray is an associative array containing our new data.

$newarray = array( 'name' => 'manish', 'email' => '[e-mail]'); $this->session->set_userdata($newarray); 

Retrieving Session

$session_id = $this->session->userdata('session_id');

Above function returns FALSE (boolean) if the session array does not exist.

Retrieving All Session Data

$this->session->all_userdata()

I have taken reference from http://www.tutsway.com/codeigniter-session.php.

回答5:

In codeigniter we are able to store session values in a database. In the config.php file make the sess_use_database variable true

$config['sess_use_database'] = TRUE;
$config['sess_table_name'] = 'ci_sessions';

and create a ci_session table in the database

CREATE TABLE IF NOT EXISTS  `ci_sessions` (
    session_id varchar(40) DEFAULT '0' NOT NULL,
    ip_address varchar(45) DEFAULT '0' NOT NULL,
    user_agent varchar(120) NOT NULL,
    last_activity int(10) unsigned DEFAULT 0 NOT NULL,
    user_data text NOT NULL,
    PRIMARY KEY (session_id),
    KEY `last_activity_idx` (`last_activity`)
);

For more details and reference, click here

回答6:

In CodeIgniter you can store your session value as single or also in array format as below:

If you want store any user’s data in session like userId, userName, userContact etc, then you should store in array:

<?php
$this->load->library('session');
$this->session->set_userdata(array(
'userId'  => $user->userId,
'userName' => $user->userName,
'userContact '  => $user->userContact 
)); 
?>

Get in details with Example Demo :

http://devgambit.com/how-to-store-and-get-session-value-in-codeigniter/