Page refresh (F5) always causing form to submit - php

Question

a bit new to CI, googled and overflowed alot and still got no answer
User enters site.
After succesful auth got redirected to main page
Link on the url stays the same with class/method
If u refresh page on a main - u always got question about repopulate form (chrome/firefox 100%)
the solution may be: after success redirect to another class or method
but i don't know how to do it, documentation seems more like reference to me
code is here: http://paste.ubuntu.com/696751/ line 28 - how to do redirect to another class or method with a redirection to another view too?

Answer 1

Well an example in CodeIgniter may be:
class login extends CI_Controller
{
function index ()
{
$this->load->library('form_validation');
$this->load->helper('url');
//Set form validation rules here: http://codeigniter.com/user_guide/libraries/form_validation.html
if ($this->form_validation->run() == TRUE)
{
//login user here
redirect('login/sucLogin'); // or just redirect to '/' if you want to send them to your home page
}
else
$this->load->view('loginForm'); //make form
}
function sucLogin ()
{
echo 'Successfully logged in';
echo anchor('/', 'Go Home');
}
}

Answer 2

Check to see if the user submitted the form
Validate the login credentials
Redirect on success
public function login()
{
if ($_POST)
{
$login = $this->input->post('login');
$password = md5($this->input->post('password'));
$q = $this->db
->where('login', $login)
->where('password', $password)
->limit(1)
->get('userbase');
if ($q->num_rows > 0 )
{
redirect('enter/main');
}
}
$returnlogin['login'] = $login;
$this->load->helpers('form');
$this->load->view('login_form',$returnlogin);
}
public function main()
{
$this->load->view('main');
}