登录 Code Igniter 后如何重定向回上一页？

Question

Okay, so this is what I do:

1. I go to www.mywebsite.com/orders?id=1

2. It redirects be to login before proceeding.

3. I log in successfully but it redirects to www.mywebsite.com/orders .

If I am already logged in and go directly using GET method, it works fine. But if I am asked to login, the GET method disappears.

How do I preserve ?id=1 ?

Answer 1

Before redirecting the user back to the login page store the current page (the requested page) in a session variable. Assuming you have a function called check_login this would more or less look like what you should do:

public function check_login() {
    if (!$this->session->has_userdata('logged_in') || $this->session->logged_in !== true) {
        if (!empty($_SERVER['QUERY_STRING'])) {
            $uri = uri_string() . '?' . $_SERVER['QUERY_STRING'];
        } else {
            $uri = uri_string();
        }
        $this->session->set_userdata('redirect', $uri);
        redirect('/auth/login');
    }
}

Then when the user successfully logs in your login function should somewhere have the following logic:

public function login() {

    // form validation
    // get post vars
    // check username/pwd against db
    if ($login) {

        if ($this->session->has_userdata('redirect')) {
            redirect($this->session->redirect);
        } else {
            redirect('/dashboard');
        }

    } else {
        // error logging in
    }

}

Answer 2

session variable could store the id.While log in using session pass the id value.You can retrive the value anywhere in session.

$this->load->library('session'); $this->session->set_userdata('userId', 'YourId');

where userId would be the name of the session variable, and YourId would be the value.

Answer 3

只需使用此重定向($_SERVER['HTTP_REFERER']);