Confirm form submission error in codeigniter grocery crud - php

Question

When i click on back button, i got the confirm form submission error .How to prevent this issue?Please provide solution for this.
I am trying to login to the admi panel and edit in admin in this following code
Admin controller:
public function index()
{
$data = $this->data;
$this->load->view('admin/login.php',$data);
}
public function login()
{
$data = $this->data;
$username=$this->input->post("username");
$password=$this->input->post("password");
if($username=='admin'&&$password=='admin123')
{
$this->load->view('admin/home.php',$data);
}
else
{
$data['error']="Invalid Username or Password";
$this->load->view('admin/login.php',$data);
}
}
/* Function For Displaying the home page*/
public function home()
{
$data = $this->data;
$this->load->view('admin/index.php',$data);
}
/* Common Function for calling the View*/
public function _admin_output($output = null)
{
$output->base=$this->config->item('base_url');
$output->site=$this->config->item('site_url');
$output->css=$this->config->item('css');
$output->js=$this->config->item('js');
$this->load->view('admin/home_page.php',$output,'refresh');
}
public function loadSlidingimg()
{
$crud = new grocery_CRUD();
$crud->set_table('tbl_slideimg');
$crud->columns('imgname','active');
$crud->set_subject('Frontpage Sliding Images');
$crud->display_as('imgname','Image name');
$crud->set_field_upload('imgname','uploads');
$crud->display_as('active','Active Flag');
$crud->callback_after_update(array($this,'rename_slideimg_db'));
$crud->callback_after_insert(array($this,'rename_slideimg_db'));
$output = $crud->render();
$this->_admin_output($output);
}
}
Please provide solution for this issue

Answer 1

It happens because the action that took you to that page was a POST request. The browser wants to save you from unintentional double-ordering/paying/whatever when you go "back", when loading that page would need to do the form posted again.
How to work that around? I usually redirect the user to a page which was loaded by a GET request, it can be even the same page, see this answer: https://stackoverflow.com/a/3968038/357403
Or, you could modify the history: https://developer.mozilla.org/en-US/docs/Web/API/History_API
Also, please see the PRG pattern: https://en.wikipedia.org/wiki/Post/Redirect/Get

Answer 2

Try this code format:
$this->load->view('admin/home.php', 'refresh', $data);
or
redirect('home', 'refresh');