Description
CodeIgniter Session gives the information about the condition of the client and the track the user information when they visit the website.
If a request is made by the user to the server, a session creates automatically in the server to track the requests from the user. A session will run after every page load globally.
Description
CodeIgniter session class will manage and stores session data of each user. A session library can be loaded in two ways:
Method-1 : Load the session by adding the below statement in Controller constructor.
[php]$this->load->library('session');[/php]
Method-2 : Load the session using the file
autoload.php present in the filepath applicatio/config in Controller constructor by adding the below code.
[php]$autoload['libraries'] = array('session');[/php]
Note: Normally, CodeIgniter Session class won't use default PHP sessions because session class creates its own session data. Description
The data to the session can be added using the method
set_userdata(). Every user data can be added individually or can be grouped into an associative array.
[php]$this->session->set_userdata($array); // $array is an associative array of your new data[/php]
Session data can read and retrieve the data using the method userdata() with array index as the value.
[php]$this->session->userdata('item'); // Where item is the array index like session id[/php]
All the data of the session can be retrieved using the method all_userdata()
[php]$this->session->all_userdata() // Read all session values[/php]
All the session data can be removed using the method unset_userdata.
[php]$this->session->unset_userdata('some_name'); // Removing values from session[/php]
The method sess_destory() will completely destroy the session in the application.
[php]$this->session->sess_destroy();[/php] Example
[php]
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class MyController extends CI_Controller {
public function session1()
{
$this->session->set_userdata('test','CodeIgniter');
}
public function getsession()
{
echo $this->session->userdata('test');
}
public function session2()
{
$data = array('sno'=>1,'name'=>'vikram','course'=>'CodeIgniter');
$this->session->set_userdata($data);
}
public function getsession2()
{
echo $this->session->userdata('sno') . '<br>';
echo $this->session->userdata('name') . '<br>';
echo $this->session->userdata('course') . '<br>';
}
public function uset()
{
$this->session->unset_userdata('sno');
$this->session->unset_userdata('name');
}
public function clearsession()
{
$this->session->sess_destroy();
}
}
[/php]
In the above code, "test" is the method which stores the individual value 'CodeIgniter' in the session.
Key Points
- CodeIgniter Session gives the information about the condition of the client and the track the user information when they visit the website.
- set_userdata() adds the session data to the application.