php - 如何获取 session 数组数据 CodeIgniter

Question

如果我将 session 数据更改为数组(我是 CodeIgniter 的新手)，我不太清楚为什么用户名没有出现在 View 页面上。我有 auth Controller 来进行登录过程:

function index() {
            $this->load->library('form_validation');
            $this->form_validation->set_rules('username', 'username', 'required|trim|xss_clean');
            $this->form_validation->set_rules('password', 'password', 'required|trim|xss_clean');

        if ($this->form_validation->run() == FALSE) {
            $this->load->view('Login');
            # code...
        }
        else {
            $username = $this->input->post('username');
            $password = $this->input->post('password');
            $check = $this->M_login->check($username, $password);

            // session data
            if ($check->num_rows() == TRUE) {
                foreach ($check->result() as $value) {
                    $sess_data['id']            = $value->id;
                    $sess_data['name']          = $value->name;
                    $sess_data['username']      = $value->username;
                    $sess_data['password']      = $value->password;
                    $sess_data['description']   = $value->description;
                    $this->session->set_userdata($sess_data);                        
            }
            redirect('Dashboard');
        }
        else {
            $this->session->set_flashdata('result_login', '<br>Invalid username or password, try again.');
            redirect('Login');
        }

这是我的仪表板 Controller :

public function __construct() {
            parent::__construct();
            if(!$this->session->userdata('id')){
                redirect('login');
            }
    }

    public function index() {
        // Dashboard view
        $username = $this->session->userdata('username');

        $data['username']=$username;

        $this->load->view('Dashboard', $data);    
    }

    function logout() {
        $this->session->sess_destroy('id');
        redirect('login');
    }

使用上面的代码，我可以通过 echo $username 在我的仪表板 View 中获取用户名。但是当我像这样更改 session 数据时:

if ($check->num_rows() == TRUE) {
   foreach ($check->result() as $value) {

   // session data
   $sess_data = array(
               'id'           => $value->id,
               'username'     => $value->username,
               'password'     => $value->password,
               'name'         => $value->name,
               'description'  => $value->description
             );
   $this->session->set_userdata('log',$sess_data);
   }
}

Dashboard controller 变成了这样:

if(!$this->session->userdata('id')) {
     $getdata= $this->session->userdata('log');

     $data['username'] = $getdata['username'];
}
$this->load->view('Dashboard', $data);

然后用户名从 View 页面中消失了。我如何将用户名存储在 session 数组中并在 View 页面中调用它。请分享您更好的建议或您的经验。

谢谢。

Answer 1

在 session 中添加数据:-

$newdata = array(
               'username'  => 'johndoe',
               'email'     => 'johndoe@some-site.com',
               'logged_in' => TRUE
           );

$this->session->set_userdata($newdata);

从 session 中检索数据:-

$this->session->all_userdata()

检索单个数据:-

$session_id = $this->session->userdata('username');