未定义的属性：CI :: $ session [英] Undefined property: CI::$session

问题描述

我无法在登录页面上加载模型。这里的会话有问题。我有一个安全类帮助程序，其中$ key是它的一部分。但是，我认为这与错误提示所涉及的会话有关。

I am having trouble loading my model on my login page. It has a problem with sessions on here. I have a security class helper which $key is part of it. But I think it is to do with session as error says.

我认为我已经设置了正确的num行，不确定是否也可能是造成这种情况的原因。

I think I have set up num rows correct not sure if also that may be cause of it.

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;
        }
    }

推荐答案

如果您在代码中使用会话，然后通过设置加密密钥确保自动加载config.php文件。如果您不自动加载，则可以使用 $ this-> load-&> library（’session’）加载。
但是必须设置加密密钥才能在控制器功能中自动加载或加载会话。

If you are using session in your code then make sure to autoload in config.php file by setting an encryption key. If you don't autoload it then you can load it using $this->load->library('session'). But you must set encryption key in order to autoload or load session in controller functions.

此处有详细信息。 在codeigniter中使用会话

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