change csrf token after form submission in codeigniter

Question

in my config file i have the following csrf setting:

$config['csrf_protection'] = TRUE;
$config['csrf_token_name'] = 'csrf_test_name';
$config['csrf_cookie_name'] = 'csrf_cookie_name';
$config['csrf_expire'] = 7200;
$config['csrf_regenerate'] = TRUE;
$config['csrf_exclude_uris'] = array();

problem with that is after form submission the session doesn't get deleted.If the session doesn't get destroyed after form submission ,it will create a security risk.I mean that's how it should work that i submit a form and after form submission the token gets deleted from session.

How i can solve this issue?

Answer 1

$config['csrf_regenerate'] = FALSE;