Session flashdata doesn´t work on form submit - php

Question

I am using the ion-auth "library" for codeigniter (https://github.com/benedmunds/CodeIgniter-Ion-Auth) and I am getting a trouble with the flashdata. This is a sumary of code:
public function reset_password($code = NULL)
{
if (!$code)show_404();
$this->user = $this->ion_auth->forgotten_password_check($code);
if ($this->user)
{
//setting the rules
if ($this->form_validation->run() == false)
{
//more code
$this->_get_csrf_nonce();
/*
One of the things this function (_get_csrf_nonce) makes is:
$this->session->set_flashdata('csrfkey', $key);
$this->session->set_flashdata('csrfvalue', $value);
*/
//The next thing is load the view with the form
}
else //form is running
{
echo "flashdata csrfkeyvalue: ".$this->session->flashdata('csrfvalue')."<br>";
die;
//more code, but not important by the moment
}
}
}
Well, the echo of $this->session->flashdata('csrfvalue') when the form is submited allways show nothing.
If I make something like:
private function _get_csrf_nonce(){
/*$this->load->helper('string');
$key = random_string('alnum', 8);
$value = random_string('alnum', 20);
$this->session->set_flashdata('csrfkey', $key);*/
$this->session->set_flashdata('csrfvalue', $value);
redirect(base_url("auth/test"));
//return array($key => $value);
}
public function test()
{
echo "flashdata csrfkeyvalue: ".$this->session->flashdata('csrfvalue')."<br>";
}
In this case... it works. The view I am using to the form is very very similar from this: https://github.com/benedmunds/CodeIgniter-Ion-Auth/blob/2/views/auth/reset_password.php
Thanks.

Answer 1

SOLUTION
After fighting a little, I was looking for something that could make a new request between the view of form was loaded and the form was submited... finally, I discover (I didn´t remember) a javascript that is request though a controller (to translate some texts, based on this tutorial: http://www.student.kuleuven.be/~r0304874/blog/international-javascript-files-in-codeigniter.html). I was loaded in this way:
<script src="<?=site_url('jsloader/login.js');?>" type="text/javascript"></script>
Thanks.