Login Controller

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

        $temp_user = $this->login_model->get_user($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)
        {
            $this->load->view('login_view');
        }
        else
        {
            if ($num_user == 0)
            { // Username Tidak Terdaftar
                $this->session->set_flashdata('notification','Username Anda tidak Terdaftar, Hubungi Administrator !');
                redirect(site_url('login'));
                echo '1';
            } elseif ($num_user > 0)
            { // Username Terdaftar
                $temp_account = $this->login_model->check_user_account($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,
                                        'level'     => $temp_account->user_level,
                                        'logged_in_hrd' => TRUE
                                        );

                    $this->session->set_userdata($array_item);
                    if ($this->session->userdata('level') == 'Admin') // Admin
                    {
                        redirect(site_url('home'));
                    }
                }
                else
                {
                    $this->session->set_flashdata('notification','LOGIN GAGAL !!, Username and Password Anda Salah.');
                    redirect(site_url('login'));
                }
            }
        }
    }