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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.

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

model

<?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; } }
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2 Answers 2

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25

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.

Detailed information here. Working with sessions in codeigniter

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Dead link rendered this answer useless.
2

plus of the started session, you need to check parent in constructor function or write this code in your constructor: **parent::__construct();**

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2 Comments

this is important. (but without the * character)
Exactly what I wanted :) I wanted to authorize user if he has access to these methods in current controller or not in my constructor. Your answer fixed it.