BCRYPT_CI

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

class User_model extends CI_Model {

    // load database
    public function __construct()
    {
        parent::__construct();
        $this->load->database();
    }

    // Listing
    public function listing()
    {
        $this->db->select('users.*,
                            bagian.nama_bagian');
        $this->db->from('users');
        // join
        $this->db->join('bagian', 'bagian.id_bagian = users.id_bagian', 'left');
        // End join
        $this->db->order_by('users.id_user', 'desc');
        $query = $this->db->get();
        return $query->result();
    }

    // Total
    public function total()
    {
        $this->db->select('COUNT(*) AS total');
        $this->db->from('users');
        $query = $this->db->get();
        return $query->row();
    }

    // Login
    public function login($username,$password)
    {
        $this->db->select('users.*,
                            bagian.nama_bagian');
        $this->db->from('users');
        // join
        $this->db->join('bagian', 'bagian.id_bagian = users.id_bagian', 'left');
        // End join
        // where
        $this->db->where(array( 'username'  => $username,
                                'password'  => $password
                            ));
        $this->db->order_by('users.id_user', 'desc');
        $query = $this->db->get();
        return $query->row();
    }

    // Detail
    public function detail($id_user)
    {
        $this->db->select('users.*,
                            bagian.nama_bagian');
        $this->db->from('users');
        // join
        $this->db->join('bagian', 'bagian.id_bagian = users.id_bagian', 'left');
        // End join
        // where
        $this->db->where('users.id_user', $id_user);
        $this->db->order_by('users.id_user', 'desc');
        $query = $this->db->get();
        return $query->row();
    }

    // Tambah
    public function tambah($data)
    {
        $this->db->insert('users', $data);
    }

    // Edit
    public function edit($data)
    {
        $this->db->where('id_user', $data['id_user']);
        $this->db->update('users', $data);
    }

    // Delete
    public function delete($data)
    {
        $this->db->where('id_user', $data['id_user']);
        $this->db->delete('users', $data);
    }
}

/* End of file User_model.php */
/* Location: ./application/models/User_model.php */

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

class Login extends CI_Controller {

    // load model
    public function __construct()
    {
        parent::__construct();
        $this->load->model('user_model');
    }

    // Login page
    public function index()
    {
        // Validasi input
        $this->form_validation->set_rules('username','Username','required',
            array(  'required'  => '%s harus diisi'));

        $this->form_validation->set_rules('password','Password','required',
            array(  'required'  => '%s harus diisi'));

        if($this->form_validation->run()) {
            $username   = strip_tags($this->input->post('username'));
            $password   = strip_tags(password_hash($this->input->post('password'), PASSWORD_BCRYPT));
            // Proses ke simple login
            $this->simple_login->login($username,$password);
        }
        // End validasi

        $data = array(  'title'     => 'Halaman Login');
        $this->load->view('login/list', $data, FALSE);
    }

    // Logout
    public function logout()
    {
        // Panggil library logout
        $this->simple_login->logout();
    }

}

/* End of file Login.php */
/* Location: ./application/controllers/Login.php */

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

class Simple_login
{
    protected $CI;

    public function __construct()
    {
        $this->CI =& get_instance();
        // load user model
        $this->CI->load->model('user_model');
    }

    // Fungsi login
    public function login($username,$password)
    {
        // Check user yang login
        $user_login = $this->CI->user_model->login($username,$password);
        // Kalau ada, maka masuk ke halaman dashboard
        if($user_login) {
            $id_user        = $user_login->id_user;
            $id_bagian      = $user_login->id_bagian;
            $nama_bagian    = $user_login->nama_bagian;
            $username       = $username;
            $nama           = $user_login->nama;
            $akses_level    = $user_login->akses_level;
            // Create session utk login
            $this->CI->session->set_userdata('id_user',$id_user);
            $this->CI->session->set_userdata('id_bagian',$id_bagian);
            $this->CI->session->set_userdata('nama_bagian',$nama_bagian);
            $this->CI->session->set_userdata('username',$username);
            $this->CI->session->set_userdata('nama',$nama);
            $this->CI->session->set_userdata('akses_level',$akses_level);
            // Lalu redirect masuk ke halaman dashboard
            $this->CI->session->set_flashdata('sukses', 'Anda berhasil login');
            // Periksa user mengakses halaman mana sebelumnya
            if($this->CI->session->userdata('pengalihan')) {
                // Jika, ada alihkan
                $pengalihan = $this->CI->session->userdata('pengalihan');
                redirect($pengalihan,'refresh');
            }else{
                // Jika ga ada, default masuk ke halaman dasbor
                redirect(base_url('admin/dasbor'),'refresh');
            }
        }else{
            // Kalau ga ada user yg cocok, suruh login lagi
            $this->CI->session->set_flashdata('warning', 'Username/password salah');
            redirect(base_url('login'),'refresh');
        }
    }

    // Fungsi logout
    public function logout()
    {
        // Meng-unset semua session
        $this->CI->session->unset_userdata('id_user');
        $this->CI->session->unset_userdata('id_bagian');
        $this->CI->session->unset_userdata('nama_bagian');
        $this->CI->session->unset_userdata('username');
        $this->CI->session->unset_userdata('nama');
        $this->CI->session->unset_userdata('akses_level');
        $this->CI->session->unset_userdata('pengalihan');
        // Redirect ke halaman login
        $this->CI->session->set_flashdata('sukses', 'Anda berhasil logout');
        redirect(base_url('login'),'refresh');
    }

    // Fungsi check login: seseorang sudah login atau belum
    public function check_login($pengalihan)
    {
        // Check status login (kita ambil status username dan akses level)
        if($this->CI->session->userdata('username') == "" &&
            $this->CI->session->userdata('akses_level') == "")
        {
            $this->CI->session->set_flashdata('warning', 'Anda belum login');
            redirect(base_url('login'),'refresh');
        }
    }

    // Fungsi check login: seseorang sudah login atau belum
    public function cek_login($pengalihan)
    {
        // Check status login (kita ambil status username dan akses level)
        if($this->CI->session->userdata('username') == "" &&
            $this->CI->session->userdata('akses_level') == "")
        {
            $this->CI->session->set_flashdata('warning', 'Anda belum login');
            redirect(base_url('login'),'refresh');
        }
    }
}

/* End of file Simple_login.php */
/* Location: ./application/libraries/Simple_login.php */