How to prevent user to "go back" after login in codeigniter?

@giovanny.lueilwitz 

To prevent a user from going back to the login page after they have already logged in, you can implement a redirect in the login controller. Here's how you can do it in CodeIgniter:

1. In your login controller, after the user has successfully logged in, check if they are already logged in using the logged_in() function of CodeIgniter's session library. If the user is logged in, redirect them to a different page.

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public function login() {
    // Check if user is already logged in
    if ($this->session->logged_in) {
        redirect('dashboard'); // Redirect to dashboard or any other page
    }

    // Process login logic here

    // If login is successful, set session variable
    $this->session->set_userdata('logged_in', true);

    // Redirect to dashboard after successful login
    redirect('dashboard');
}

1. Make sure to load the session library in your controller constructor to make use of CodeIgniter's session functions.

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public function __construct() {
    parent::__construct();
    $this->load->library('session');
}

By implementing this redirect logic in your login controller, the user will be redirected to a different page if they try to access the login page after they have already logged in.