How to avoid $_POST resending data?

[eluser]Michael Wales[/eluser]
Eliminating refresh reposting is very easy in CodeIgniter:

Code:

if ($this->validation->run()) {
  // Our code validatates
  // Add to database
  redirect('somewhere');
  return;
}

$this->load->view('my_form');

Since you are redirecting after the submission of data, it's impossible for the refresh to resubmit.