form-validation in codeigniter - php

Question

<?php echo validation_errors(); ?>
<?php echo form_open('verifylogin'); ?>
<label for="username">Username:</label>
<input type="text" size="20" id="username" name="username"/>
<br/>
<label for="password">Password:</label>
<input type="password" size="20" id="password" name="password"/>
<br/>
<input type="submit" value="Login"/>
</form>
I use that code to validate a filled in form but the browser shows nothing after I submit. The URL of my browser is stuck at http://example.com/index.php/verifylogin
verifylogin.php is defined like this
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class VerifyLogin extends CI_Controller {
function __construct()
{
parent::__construct();
$this->load->model('user','',TRUE);
}
function index()
{
//This method will have the credentials validation
$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)
{
//Field validation failed. User redirected to login page
$this->load->view('login_view');
}
else
{
//Go to private area
redirect('home', 'refresh');
}
}
function check_database($password)
{
//Field validation succeeded. Validate against database
$username = $this->input->post('username');
//query the database
$result = $this->user->login($username, $password);
if($result)
{
$sess_array = array();
foreach($result as $row)
{
$sess_array = array(
'id' => $row->id,
'username' => $row->username
);
$this->session->set_userdata('logged_in', $sess_array);
}
return TRUE;
}
else
{
$this->form_validation->set_message('check_database', 'Invalid username or password');
return false;
}
}
}
?>

Answer 1

class Auth extends CI_Controller{
public function __construct(){parent::__construct();}
/**
* Login Form
*
* $route['login'] = 'auth/login_form';
*
*/
public function login_form(){
$this->load->view('login_form');
}
/**
* Login Validation
*
* $route['login/check'] = 'auth/login_check';
* Point your form to login/check
*/
public function login_check()
{
if($this->form_validation->run() == TRUE)
{
//form validates...
}else
{
//no redirect! just show for again!
$this->login_form();
}
}
}