Set Userdata

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Administrator extends CI_Controller {
    function __construct() {
        parent::__construct();
        $this->load->model('administrator_model');
    }

    public function index() {
        $session = $this->session->userdata('logged_in_dagsar');
        if ($session == FALSE) {
            $this->load->view('administrator_view');
        } else {
            redirect(site_url('admin/home'));
        }
    }

    public function validasi() {
        $username   = trim($this->input->post('username', 'true'));
        $password   = trim($this->input->post('password', 'true'));

        $temp_user  = $this->administrator_model->get_user($username)->row();
        $num_user   = count($temp_user);

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

        if ($this->form_validation->run() == FALSE) {
            $this->load->view('administrator_view');
        } else {
            if ($num_user == 0) {
                $this->session->set_flashdata('notification','<b>Maaf !! Username Anda Tidak Terdaftar.</b>');
                redirect(site_url('administrator'));
            } elseif ($num_user > 0) {
                $temp_account = $this->administrator_model->check_user_account($username, sha1($password))->row();
                $num_account = count($temp_account);

                if ($num_account > 0) {
                    $array_item = array('username'                  => $temp_account->user_username,
                                        'nama'                      => $temp_account->user_name,
                                        'avatar'                    => $temp_account->user_avatar,
                                        'level'                     => $temp_account->user_level,
                                        'logged_in_dagsar'          => TRUE
                                        );
                    $this->session->set_userdata($array_item);

                    redirect(site_url('admin/home'));
                } else {
                    $this->session->set_flashdata('notification','<b>Login Gagal, Username atau Password Salah.</b>');
                    redirect(site_url('administrator'));
                }
            }
        }
    }

    public function logout() {
        $this->output->set_header('Last-Modified: ' . gmdate("D, d M Y H:i:s") . 'GMT');
        $this->output->set_header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
        $this->output->set_header('Pragma: no-chace');
        $this->session->sess_destroy();
        redirect(base_url());
    }
}
/* Location: ./application/controller/Administrator.php */