Codeigniter处理用户登录验证后URL跳转，主要涉及到了My_Controller.php页面以及登录验证模块User.php页面，具体代码如下：

My_Controller.php页面：

复制代码 代码如下:class MY_Controller extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();
        /*判断是否登录，判断当前URL是否是auth/login*/
        if ( ! $this->tank_auth->is_logged_in()
                && ( $this->router->fetch_class() != "auth" && $this->router->fetch_method() != "login"))
        {
            $redirect = $this->uri->uri_string();

            if ( $_SERVER["QUERY_STRING"])
            {
                $redirect .= "?" . $_SERVER["QUERY_STRING"];
            }
            /*跳转到用户登陆页面，指定Login后跳转的URL*/
            redirect("auth/login?redirect=".$redirect);
        }   
    }
}

User.php页面：

复制代码 代码如下:class User extends MY_Controller
{
    function login()
    {

        if ($this->tank_auth->is_logged_in()) {                                    // logged in
            redirect("/");

        } else {
            //other codes here......
            /*判断是否有redirect信息*/
            $data["redirect"] = isset($_GET["redirect"]) ? $_GET["redirect"] : "/";

            if ($this->form_validation->run()) {                                // validation ok
                if ($this->tank_auth->login(
                        $this->form_validation->set_value("login"),
                        $this->form_validation->set_value("password"),
                        $this->form_validation->set_value("remember"),
                        $data["login_by_username"],
                        $data["login_by_email"])) {                                // success
                    redirect($data["redirect"]);

                } else {
                    //error handling
                }
            }
            $this->load->view("login_form")
        }
    }
/*
Note: 在login_form中需要注意，提交表单的form地址：
<?php echo form_open(site_url("/auth/login?redirect=".$redirect)); ?>
*/
}

在login_form中需要注意，提交表单的form地址为：

复制代码 代码如下:<?php echo form_open(site_url("/auth/login?redirect=".$redirect)); ?>