Create Authentication Login On Code Igniter With Extends Controller

1. Create MY_Controller.php on /system/apllication/libraries/.

<?php
class MY_Controller extends Controller {

    function  My_Controller() {
        parent::Controller();
        $this->is_logged_in();
    }

    private function is_logged_in() {
        $this->ci =& get_instance();
        $this->ci->load->library('session');
        if(! $this->ci->session->userdata('login')) {
            redirect('login');
        }
    }

}
?>

2. Login Controller login.php

<?

/**
 * Login Class
 *
 *
 */
class Login extends Controller {
 /**
  * Constructor
  */
 function login()
 {
  parent::Controller();
  $this->load->model('Login_model', '', TRUE);
 }

 /**
  * Check User Status, if login status it will appear in main page,
  * If Not it'll redirect in login page
  */
 function index()
 {
  if ($this->session->userdata('login') == TRUE)
  {
   redirect('home');
  }
  else
  {
   $this->load->view('login/login_view');
  }
 }

 /**
  * Login
  */
 function process_login()
 {

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

  if ($this->form_validation->run() == TRUE)
  {
   $username = $this->input->post('username');
   $password = $this->input->post('password');

   if ($this->Login_model->check_user($username, $password) == TRUE)
   {
    $row = $this->Login_model->data_user($username);
    $data = array('jbname' => $username, 'login' => TRUE, 'jbnama' => $row['nama'], 'jbid' => $row['id_user']);
    $this->session->set_userdata($data);
    redirect('home/');
   }
   else
   {
    $this->session->set_flashdata('message', 'Sorry, username and password is wrong');
    redirect('login/index');
   }
  }
  else
  {
   $this->load->view('login/login_view');
  }
 }

 /**
  * logout
  */
 function process_logout()
 {
  $this->session->sess_destroy();
  redirect('login', 'refresh');
 }
}

3. Make Model Login_model.php

<?php
/**
 * Login_model Class
 *
 *
 */
class Login_model extends Model {
 /**
  * Constructor
  */
 function Login_model()
 {
  parent::Model();
 }

 // Inisialisation user table name
 var $table = 'user';

 /**
  * Check user table
  */
 function check_user($username, $password)
 {
  $password = md5($password);
  $query = $this->db->get_where($this->table, array('username' => $username, 'pass' => $password, 'aktif' => 1,
  'nm_module' => 'akd'), 1, 0);

  if ($query->num_rows() > 0)
  {
   return TRUE;
  }
  else
  {
   return FALSE;
  }
 }

 function data_user($username){
  $sql = "select id_user, nama from user where username = '$username' and nm_module = 'akd' ";
  $query = $this->db->query($sql);
  $row = $query->row_array();
  return $row;
 }

}
// END Login_model Class

/* End of file login_model.php */
/* Location: ./system/application/model/login_model.php */

Read More