Codeigniter登錄和注銷會話（如果功能不正確）

Question

我的登錄和注銷會話在以下情況下無法正常工作：我不知道該怎么做總是在if代碼之外。 即使我輸入的用戶名和密碼與數據庫中的用戶名和密碼相同

控制器：Login.php

class Login extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->library(array('session', 'form_validation'));
        $this->load->helper(array('url', 'form'));
        $this->load->model("Member_model");
    }

    public function loginMember() {

        $this->form_validation->set_rules('username','Username','required');
        $this->form_validation->set_rules('password','Password','required');

        if ($this->form_validation->run($this) == FALSE) {

            $this->load->view('front/login');

        } else {

            //enter username and password
            $username = $this->input->post('username');
            $password = $this->input->post('password');

            $this->load->model('Member_model');
            $member = $this->Member_model->checkLogin($username, $password);

            if ($member > 0) {

                $data_session = array(
                    'nama' => $member->username,                
                    'logged_in' => true
                );
                $this->session->set_userdata($data_session);

                //redirect
                redirect('Member/profile');

            } else {

                print_r('User doesnt exist');

            }
        }
    }


    //logging out of a user
    public function logoutMember() {
        $this->session->sess_destroy();
        redirect('Member/Login');
    }
}

型號：Member_model.php

 public function checkLogin($username, $password) {

        $this->db->select('password');
        $this->db->from('member');
        $this->db->where(array('username' => $username, 'password'=> $password));
        $hash = $this->db->get()->row('password');

        return $this->verify_password_hash($password, $hash);

        if ($hash->num_rows()>0) {
            return $hash->row(); 
        } else {
            return false;
        }
    }
   private function hash_password() {

    return password_hash($password, PASSWORD_BCRYPT);   
}


private function verify_password_hash($password, $hash) {

    return password_verify($password, $hash);   
}

查看：Home.php

<li class="dropdown">
                                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
                                    <?php echo $this->session->userdata("nama");?>
                                    Member<span class="caret"></span></a>
                                <ul class="dropdown-menu">
                                    <li><a href="<?php echo site_url('checkout')?>"><img src="<?php echo base_url('assets/img/shopping-cart.png')?>" style="height:15px;width:15px;"> Checkout</a></li>
                                    <li role="separator" class="divider"></li>
                                    <li><a href="<?php echo base_url('login/logoutMember')?>">Logout</a></li>
                                </ul>
                            </li>

我不知道該怎么辦，Login Controller中loginMember代碼上的if（$ member）無法正常工作，每次輸入數據時總會出現其他情況。 但是當我這樣評論if（$ member）時：

         $this->load->model('Member_model');
            $member = $this->Member_model->checkLogin($username, $password);

            $_SESSION['logged_in']   = true;
            $_SESSION['username']    = $member->username;

            redirect('Member/profile');

//            if ($member > 0) {
//                
//                $data_session = array(
//                    'nama' => $member->username,                
//                    'logged_in' => true
//                );
//                $this->session->set_userdata($data_session);
//                
//                //set session variables
////                $_SESSION['logged_in']   = true;
////                $_SESSION['username']    = $member->username;
//                
//                //redirect
//                redirect('Member/profile');
//                
//            } else {
//                
//                print_r('User doesnt exist');
//                
//            }

它工作正常，但是當我調用會話用戶名顯示當時誰在登錄時，我無法在view home上使用該會話。 我在Controller Member中調用了視圖，如下所示：

控制器：Member.php

public function profile() {
    if( $this->session->userdata('logged_in')){
        $data["slider"] = $this->Indexweb_model->getAll();
        return $this->load->view('front/home', $data);
    }
    redirect('Member/Login');
}

Answer 1

嘗試模型

if ($hash->num_rows() > 0) { 
    return $hash->row(); 
} else { 
    return FALSE; 
} 

控制器：

if (!$member)

Answer 2

檢入控制器的索引方法：

public function index(){
        if( $this->session->userdata('logged_in'))
          return redirect('Dashboard');
        $this->load->view('login');
    }