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facebook-ion-auth

Facebook login working with CodeIgniter Ion Auth

Requirement

Installation

  • Copy config/facebook_ion_auth.php to application/config/facebook_ion_auth.php.
  • Copy libraries/Facebook_ion_auth.php to application/libraries/Facebook_ion_auth.php.
  • Configure your Facebook API settings in application/config/facebook_ion_auth.php for

Example Usage

Assuming that you have installed CodeIgniter Ion Auth, add this in application/config/autoload.php.

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

Create application/core/MY_AuthController.php and put this code into the file

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

/**
 * AuthController
 */
class MY_AuthController extends CI_Controller
{
    public function __construct()
    {
        parent::__construct();

        $this->load->config('ion_auth', true);

        if (uri_string() != 'auth/login') {
            $this->_is_login();
        }
    }

    private function _is_login()
    {
        if (!$this->ion_auth->logged_in()) {
            redirect('auth/login');
        }
    }
}

To auto-load all files in application/core/, add this code in application/config/config.php.

/**
| -------------------------------------------------------------------
|  Native Auto-load
| -------------------------------------------------------------------
|
| Nothing to do with config/autoload.php, this allows PHP autoload to work
| for base controllers and some third-party libraries.
|
*/
function __autoload($class)
{
    if(strpos($class, 'CI_') !== 0) {
        require(APPPATH . 'core/'. $class . '.php');
    }
}

Extends the default controller application/controllers/Welcome.php to MY_AuthController.php for authentication check.

class Welcome extends MY_AuthController {
    // ....
}

Create a new controller file application/controllers/Facebook_login.php with the following code:

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

class Facebook_login extends CI_Controller
{
    /**
     * Index Page for this controller.
     * You will be redirected to the facebook login page
     */
    function index()
    {
        $this->facebook_ion_auth->login();
    }

    /**
     * Controller that is redirected back from facebook after login
     */
    public function action()
    {
        $code = $this->input->get('code');
        if ($code) {
            $this->facebook_ion_auth->login();
            redirect('/');
        } else {
            redirect('auth/login');
        }
    }
}

In application/views/auth/login.php, add "Login with Facebook" button using the Facebook_login controller created above.

<a href="<?php echo site_url('facebook_login'); ?>">Login with Facebook</a>

Update application/config/facebook_ion_auth.php for redirect_uri.

$config['redirect_uri'] = site_url('facebook_login/action'); // url to redirect back from facebook.

Then, when you access your application in the browser, you will see the login form with facebook login button.

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