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

class verifylogin extends CI_Controller {

function _construct()
{
parent:: _construct();
/*$this ->load->models('user','',TRUE);*/
}
 
  function index()
  {
$this->auth();
}

  function auth()
  {

$this->load->library('form_validation');
$this->form_validation->set_rules('username','Username','trim|required|xss_clean');
$this->form_validation->set_rules('password','Password','trim|required|xss_clean|callback_check_database');

if($this->form_validation->run()==FALSE)
{

$this->load->view('view_login');
}
  else
  {
//
redirect('home','refresh');
}

  }
  function check_database($password)
  {
$username = $this->input->post('username');
$this->load->Model('user');
$result = $this->user->login($username,$password);

if($result)
{
$sess_array = array();
foreach($result as $row)
{
/*$sess_array = array('id' => $row->id,
'username'=>$row->username
);*/
$sess_array = array('username'=>$row->username,'password'=>$row->password);
$this->session->set_userdata('logged_in',$sess_array);
}
    return TRUE;
    }
    else
    {
$this->form_validation->set_message('check_database','Invalid username or password');
return false;
}
  }
  }
?>

1) Use code tags
2) Please post some code with indentation
3) Please better describe your problem. What have you tried to fix this? Are you sure the form validation is failing? If it isn’t showing the login form you would assume it is passing and your problem is in maybe the check_database function.