CodeIgniter simple login with sessions

1. Simple login with sessions in
CodeIgniter 3

2. config/routes.php
$route['default_controller'] = 'LoginController';
$route['404_override'] = '';
$route['translate_uri_dashes'] = FALSE;

3. LoginController
<?php
defined('BASEPATH') OR exit('No direct script
access allowed');
class LoginController extends CI_Controller {
public function index()
{
$data['title'] ="Login form";
$this->load->view('main_view',$data);
}

4. public function check()
{
if((($_POST["text1"]=="user1")&&($_POST["pass1"]=="pass1")))
{
$this->session->set_userdata('username',$_POST["text1"]);
return redirect('LoginController/ura');
}
else{
echo "Wrong input!";
exit;
}
}

5. public function ura()
{
if($this->session->userdata('username')){
$data['uname']=$this->session->userdata('username');
$this->load->view('ura',$data);
}
else{
return redirect('LoginController/index');
}
}
public function logout()
{
$this->session->sess_destroy();
redirect('LoginController/index');
}
}

6. views/main_view.php
<h1>
<?php echo $title; ?>
</h1>
<?php
echo form_open('LoginController/check');
#text control
$data = ['name' => 'text1',
'id' => 'text1',
'value' => '',
'maxlength' => '100',
'size' => '30',
'placeholder'=>'username',
];
#label
echo form_label('Username ', 'text1');
echo form_input($data);

7. echo "<br><br>";
#password control
$pass = ['name' => 'pass1',
'id' => 'pass1',
'maxlength' => '100',
'size' => '30',
'placeholder'=>'password',
];
echo form_label('Password ', 'pass1');
echo form_password($pass);
echo "<br><br>";
#submit button
echo form_submit('submit', 'Submit!');
echo form_close();

8. ura.blade.php
<?php
echo "Welcome ".$uname."!";
echo "<br/><br/>";
?>
<a href="<?php echo site_url('LoginController/logout') ?>">Logout</a><br/><br/>