未定義的屬性：CI :: $ session

Question

我在登錄頁面上加載模型時遇到問題。 這里的會話有問題。 我有一個安全類幫助器，其中$ key是其中的一部分。 但我認為這與會話有關，因為錯誤說。

我想我已經設置了num行正確，不確定是否也可能是它的原因。

A PHP Error was encountered
Severity: Notice
Message: Undefined property: CI::$session
Filename: core/Model.php
Line Number: 51

模型

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Users_model extends CI_Model {

    private $user_id;
    private $username;
    private $permission = array();

    public function __construct() {

        if (isset($this->session->userdata['user_id'])) {
            $user_query = $this->db->query("SELECT * FROM " . $this->input->post('dbprefix') . "user WHERE user_id = '" . (int)$this->session->userdata['user_id'] . "' AND status = '1'");

            if ($user_query->num_rows) {
                $this->user_id = $user_query->row['user_id'];
                $this->username = $user_query->row['username'];

                $this->db->query("UPDATE " . $this->input->post('dbprefix') . "user SET ip = '" . $this->db->escape($this->input->server['REMOTE_ADDR']) . "' WHERE user_id = '" . (int)$this->session->userdata['user_id'] . "'");

                $user_group_query = $this->db->query("SELECT permission FROM " . $this->input->post('dbprefix'). "user_group WHERE user_group_id = '" . (int)$user_query->row['user_group_id'] . "'");

                $permissions = unserialize($user_group_query->row['permission']);

                if (is_array($permissions)) {
                    foreach ($permissions as $key => $value) {
                        $this->permission[$key] = $value;
                    }
                }
            } else {
                $this->logout();
            }
        }
    }

    public function login($username, $password) {
        $user_query = $this->db->query("SELECT * FROM " . $this->input->post('dbprefix') . "user WHERE username = '" . $this->db->escape($username) . "' AND (password = SHA1(CONCAT(salt, SHA1(CONCAT(salt, SHA1('" . $this->db->escape($password) . "'))))) OR password = '" . $this->db->escape(md5($password)) . "') AND status = '1'");

        if ($user_query->num_rows) {
            $this->session->userdata['user_id'] = $user_query->row['user_id'];

            $this->user_id = $user_query->row['user_id'];
            $this->username = $user_query->row['username'];         

            $user_group_query = $this->db->query("SELECT permission FROM " . $this->input->post('dbprefix') . "user_group WHERE user_group_id = '" . (int)$user_query->row['user_group_id'] . "'");

            $permissions = unserialize($user_group_query->row['permission']);

            if (is_array($permissions)) {
                foreach ($permissions as $key => $value) {
                    $this->permission[$key] = $value;
                }
            }

            return true;
        } else {
            return false;
        }
    }

Answer 1

如果您在代碼中使用會話，請確保通過設置加密密鑰在config.php文件中自動加載。 如果你不自動加載它，那么你可以使用$this->load->library('session')加載它。 但您必須設置加密密鑰才能在控制器功能中自動加載或加載會話。

詳細信息在這里。 在codeigniter中使用會話

Answer 2

加上已啟動的會話，您需要在構造函數中檢查父項或在構造函數中編寫此代碼： **parent::__construct();**