Redirect Loop error in CodeIgniter - codeigniter-2

Question

I worked on this for a day. I get this same problem, but I don't understand.
<?php
class Users extends CI_Controller
{
function index()
{
redirect('Users/login');
}
function login()
{
$data['title'] = 'Selamat datang di Sistem Informasi Koperasi';
$data['main_content'] = 'login';
$this->load->view('Users/template', $data);
}
function logout()
{
$this->session->sess_destroy();
$this->session->set_flashdata('info_login', 'Anda sudah keluar dari sistem');
redirect('Users/login');
}
function validate()
{
//Load User Model
$this->load->model('Users_Model');
//Validate User
$query = $this->Users_Model->validate();
if($query != '') {
//Mengambil Roles dari Groups
$roles = $this->Users_Model->roles($query->group_id);
//$this->login_model->last_login($query);
$data = array(
'username' => $query->username,
'roles' => $roles,
'is_logged_in' => true
);
$this->session->set_userdata($data);
if($roles == 'administrators') {
redirect('Administrators/index');
} elseif($roles == 'managers') {
redirect('Managers/index');
}
else {
$this->session->set_flashdata('info_login', 'Mohon maaf anda belum terdaftar sebagai Group! Silahkan hubungi admin!');
redirect('Users/login');
}
} else {
$this->session->set_flashdata('info_login', 'Maaf,username dan password yang anda masukkan salah,silahkan coba kembali!');
redirect('Users/login');
}
}
}
In Chrome and Firefox I get this message. What should i do?
This webpage has a redirect loop The webpage at
http://localhost/simpks/index.php/Users/login has resulted in too
many redirects. Clearing your cookies for this site or allowing
third-party cookies may fix the problem. If not, it is possibly a
server configuration issue and not a problem with your computer. Here
are some suggestions: Reload this webpage later. Learn more about this
problem. Error 310 (net::ERR_TOO_MANY_REDIRECTS): There were too many
redirects.
this is my view template.php
<?php
$this->load->view('includes/header',$main_content);
$this->load->view('Users/'.$main_content);
$this->load->view('includes/footer');
?>
this is my model Users_Model.php
<?php
class Users_Model extends CI_Model{
function validate(){
$this->db->where('username',$this->input->post('username'));
$this->db->where('password',md5($this->input->post('password')));
$query = $this->db->get('Users');
if($query->num_rows == 1){
$row = $query->row();
return $row;
}
}
function roles($id){
$this->db->where('id',$id);
$query = $this->db->get('Groups');
if($query->num_rows == 1){
$row = $query->row();
return $row->name;
}
}
}
?>

Answer 1

use include instead loader if you call it in view.
ex : include 'includes/footer';

Answer 2

you don't have to put redirect('Users/login'); for session checking in your view class. Just erase it.
If you need redirect, put it in another page like users/test. If session is expired in users/test call redirect method in users/test controller. For better structure, i think you should minimize php function in view.

Answer 3

I am also facing that problem but both page's controllers i've redirects method so I add a refresh in redirect method, try it.
read at bottom of page CI redirect with refresh
<?php
class Users extends CI_Controller
{
function index()
{
redirect('another_controller/login');
}
}
Create another controller - another_controller.php
class another_controller extends CI_Controller
{
function login()
{
$this->load->view('home');
}
}