Login section with Captcha in Codeigniter with session

Controller

Create a blank document in the controller file (application -> controller) and name it login.php, in the document add all the following code.

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Login extends CI_Controller {
public function __construct()
 {
  parent::__construct();
  $this->load->library('form_validation');
   $this->load->library('session');
   $this->load->helper(array('form', 'url', 'captcha'));
   }

public function index()
 {
 $this->load->helper('captcha');
  $vals = array(
     'img_path' => './captcha/',
     'img_url' => base_url().'captcha',
'img_width' => 100,
'img_height' => 35
     );
  $cap = create_captcha($vals);
  $data = array(
     'captcha_time' => $cap['time'],
     'ip_address' => $this->input->ip_address(),
     'word' => $cap['word']
     );
  $this->session->set_userdata($data);
  $data['cap_img']=$cap['image'];
 $this->load->view('login',$data);
  }

public function checkuser()
{
$this->load->library('form_validation');
$this->form_validation->set_rules('username', 'Username', 'trim|required|min_length[3]');
$this->form_validation->set_rules('password', 'Password', 'trim|required');
$this->form_validation->set_rules('captcha', 'Security Code', 'trim|required|callback_check_captcha');
if($this->form_validation->run() == FALSE)
  {
   $this->index();
  }
  else
  {
$this->load->model('login_model');
  $username = $this->input->post('username');
   $password = $this->input->post('password');
   $numrow=$this->login_model->checkuserlogin($username,$password);
   if($numrow > 0)
   {
   $this->login_model->loggeduserdata($username,$password);
  redirect(base_url().'login/dashboard', 'refresh');
   }
    }
}


 public function check_captcha()
 {
  $expiration = time()-7200; // Two hour limit
  $cap=$this->input->post('captcha');
  if($this->session->userdata('word')== $cap 
   AND $this->session->userdata('ip_address')== $this->input->ip_address()
   AND $this->session->userdata('captcha_time')> $expiration)
  {
   return true;
  }
  else{
   $this->form_validation->set_message('check_captcha', 'Security Code does not match.');
   return false;
  }
 }


public function dashboard()
{
$this->load->view('header');
$this->load->view('sidebar');
$this->load->view('dashboard');
$this->load->view('footer');

}

  
 function logout()
 {
   $this->session->unset_userdata('logged_in');
   $this->session->unset_userdata('userid');
   $this->session->unset_userdata('username');
   $this->session->unset_userdata('emailid');
   $this->session->sess_destroy();
   redirect(base_url(), 'refresh');
 }

}

?>

View

Create a blank document in the views file (application -> views) and name it login.php, in the document add all the following code.

<?php

defined('BASEPATH') OR exit('No direct script access allowed');

?>

<div class="login-wrap" style="margin-top:120px;margin-bottom:150px;">

  <p style="color:#FF0000;font-size:11px;text-align:center;"><?php echo validation_errors(); ?></p>

  <h2>Login</h2>

  <div class="form">

 <?php echo form_open('login/checkuser'); ?>

    <p><input type="text" placeholder="Username" name="username" value="<?php echo set_value('username'); ?>" /></p>

     <p> <input type="password" placeholder="Password" name="password" /></p>

    <p style="text-align:center;"> 

<?php echo $cap_img; ?>

 <INPUT TYPE="text" id="captcha" name="captcha"  placeholder="Security Code" style="width:50% !important; margin:0px !important;"></p>

<button type="submit" name="login" value="Submit">Submit</button>

</form>

  

Model

Create a blank document in the models file (application -> models) and name it login_model.php, in the document add all the following code.

  

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Login_model extends CI_Model {

 public function __construct()

 {

  parent::__construct();

 }

 function checkuserlogin($username,$password)

 {

  $this->db->where("username",$username);

  $this->db->where("password",md5($password));

   $this->db->where("displayflag",'1');

  $query=$this->db->get("dip_admin");

  $num=$query->num_rows();

  return $num;

  

 }

 public function loggeduserdata($username,$password)

 {

 $this->db->where("username",$username);

  $this->db->where("password",md5($password));

   $this->db->where("displayflag",'1');

  $query=$this->db->get("dip_admin");

  foreach($query->result() as $rows)

  {

  //add all data to session

    $newdata = array(

      'userid'  => $rows->id,

      'username'  => $rows->username,

 'emailid'    => $rows->email,

  'logged_in'  => TRUE

    );

  }

  $session=$this->session->set_userdata($newdata);

  return true;

  

 }

 public function add_user()

 {

  $data=array(

    'username'=>$this->input->post('user_name'),

    'email'=>$this->input->post('email_address'),

    'password'=>md5($this->input->post('password'))

  );

  $this->db->insert('user',$data);

 }

}

?>

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