<div class="row justify-content-center">
<div class="col-6">
<h1><?php echo $title ?></h1>
<?php if($this->session->flashdata('message')) { ?>
<div class="alert alert-danger">
<?php echo $this->session->flashdata('message')?>
</div>
<?php } ?>
<?php echo form_open('users/login', array('id' => 'loginForm')) ?>
<div class="form-group">
<input type="text" name="email" id="email" class="form-control" placeholder="Email" />
<?php echo form_error('email', '<div class="error">', '</div>') ?>
</div>
<div class="form-group">
<input type="password" name="password" id="password" class="form-control" placeholder="Password" />
<?php echo form_error('password', '<div class="error">', '</div>') ?>
</div>
<div class="form-group">
<input type="submit" name="submit" value="Login" class="btn btn-primary"/>
</div>
<?php echo form_close(); ?>
</div>
</div>

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

class Users extends CI_Controller{

public function __construct()
{
parent::__construct();
$this->load->helper('form');
$this->load->library('form_validation');
$this->load->model('users_model');
}

private function logged_in()
{
if( ! $this->session->userdata('authenticated')){
redirect('users/login');
}
}

public function login()
{
$data['title'] = "Login";

$this->form_validation->set_rules('email', 'email', 'trim|required');
$this->form_validation->set_rules('password', 'password', 'required');

$this->form_validation->set_error_delimiters('<div class="error">', '</div>');

if($this->form_validation->run() == false){
$this->load->view('header', $data);
$this->load->view('users/login', $data);
$this->load->view('footer', $data);
}
else {
$email = $this->security->xss_clean($this->input->post('email'));
$password = $this->security->xss_clean($this->input->post('password'));

$user = $this->users_model->login($email, $password);

if($user){
$userdata = array(
'id' => $user->id,
'first_name' => $user->first_name,
'last_name' => $user->last_name,
'authenticated' => TRUE
);

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

redirect('dashboard');
}
else {
$this->session->set_flashdata('message', 'Invalid email or password');
redirect('users/login');
}
}
}

public function logout()
{
$this->session->sess_destroy();
redirect('users/login');
}
}
?>

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

class Users_model extends CI_Model{

public function login($email, $password)
{
$this->db->where('email', $email);
$this->db->where('password', md5($password));
$this->db->where('active', 1);
$query = $this->db->get('users');

if($query->num_rows() == 1) {
return $query->row();
}

return false;
}
}
?>

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

class Dashboard extends CI_Controller{

public function __construct()
{
parent::__construct();
$this->logged_in();
}

private function logged_in() {
if(! $this->session->userdata('authenticated')) {
redirect('users/login');
}
}

public function index()
{
$data['title'] = "Dashboard";

$this->load->view('header', $data);
$this->load->view('dashboard/index', $data);
$this->load->view('footer', $data);
}
}
?>

CREATE TABLE `users` (
`id` int(10) UNSIGNED PRIMARY KEY AUTO_INCREMENT NOT NULL,
`first_name` varchar(30) DEFAULT NULL,
`last_name` varchar(30) DEFAULT NULL,
`email` varchar(50) DEFAULT NULL,
`password` varchar(255) DEFAULT NULL,
`profile_photo` varchar(255) DEFAULT NULL,
`active` tinyint(1) NOT NULL,
`created_at` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;