Codeigniter, Ion Auth and Facebook Ion Auth – Tutorial

I’v recently posted an article mentioning Facebook Ion Auth, and a visitor from France asked me how did I installed it.

Please notice that you are at your own risk using this!
Please post a comment if you find any mistake, error, problem, issue, etc, etc!
Autor: Me!

The basic – Codeigniter, Ion Auth and Facebook Ion Auth

These are the steps.

1. Install CodeIgniter on your server;
2. Install Ion Auth in this CodeIgniter installation (Ion Auth’s installation tutorial);
3. Copy the php of Facebook Ion Auth library;
4. On your application/libraries/ create Facebook_ion_auth.php
5. Past the copied php from Facebook Ion Auth, to the file created on the previous step and save it!
6. On your application/config/autoload.php on $autoload[‘libraries’] add Facebook_ion_auth

1. $autoload['libraries'] = array('database', 'ion_auth', 'Facebook_ion_auth');

Create a app on Facebook

You need to create a app on Facebook!
On the top menu, go to Apps > Create a New App.

You will have now to go to Settings and Add a Platform and there, select Website.
Set now the Site URL and after it the App Domains.

Setting up Facebook Ion Auth

$this->app_id = ""; // your app id
$this->app_secret = ""; // your app secret key
$this->my_url = site_url(''); // url to redirect back from facebook
$this->scope = 'email'; // custom permissions check - http://developers.facebook.com/docs/reference/login/#permissions

Enter the values that you get from Facebook on the right places!
I’v left the my_url blank and changed the original scope (read more about the scope) to:

$this->scope = 'email, user_birthday, user_location'; // custom permissions check - http://developers.facebook.com/docs/reference/login/#permissions

Search for ‘check if this user is already registered‘.

I’ve replaced this entire code

// check if this user is already registered
 if(!$this->CI->ion_auth_model->identity_check($user->email)){
 $name = explode(" ", $user->name);
 $register = $this->CI->ion_auth->register($user->username, 'facebookdoesnothavepass123^&*%', $user->email, array('first_name' => $name[0], 'last_name' => $name[1]));
 } else {
 $login = $this->CI->ion_auth->login($user->email, 'facebookdoesnothavepass123^&*%', 1);

with this one

// check if this user is already registered
if(!$this->CI->ion_auth_model->identity_check($user->email)){
$name = explode(" ", $user->name);

if ($user->gender=='male')
{ $gender = 1; }
else
{ $user->gender = 0; }
// convert birthdate from m/d/Y to Y-m-d date mysql
$date = date("Y-m-d", strtotime($user->birthday));

$register = $this->CI->ion_auth->register($user->username, 'facebookdoesnothavepass123^&*%', $user->email, array('first_name' => $name[0], 'last_name' => $name[1], 'gender' => $gender, 'bio' => $user->bio, 'url' => $user->link, 'birthday' => $date, 'location' => $user->location->name));
} else {
$login = $this->CI->ion_auth->login($user->email, 'facebookdoesnothavepass123^&*%', 1);

This code registe the user with some other details that we get from regular Facebook Ion Auth, like

• gender,
• user bio,
• facebook link,
• birthday,
• location.

To have this working you will need to change the users table, created with Ion Auth sql script!

You will need to add the following columns:

• gender int(1)
• url varchar(256)
• bio text
• birthday date
• location varchar(56)

Okay!
Now the tricky part! Since Facebook redirects us to the URL set up on the Facebook_ion_auth.php in $this->my_url = site_url(”);

On the ‘default’ controller of the we have to call facebook_ion_auth and handle with the data sent from Facebook!

This is what I have on /application/controllers/frontpage.php – this is the controller that handles with the root of your CI.

class Frontpage extends Main_Controller {
public function index($type = null) {

 if (isset($_GET['code']))
 {
     $this->facebook_ion_auth->login();
     if (!$this->ion_auth->logged_in() || !$this->ion_auth->is_admin())
     {
           header('Location:/?alert=facebooklogin');
           exit();
     }

     header('Location:/');
 }

On application/controllers/auth.php at the end and before the last } , I’v added

function loginfacebook()
{
      $this->facebook_ion_auth->login();
}

This way when I hit the url http://mydomain.com/auth/loginfacebook/ I got the Facebook Ion Auth working for me!

Or I get registered on the App and on my website or I get logged it.