Using Facebook PHP-SDK 3.x to register/login user with Codeigniter 2.1.0

Question

Going over the Facebook API and I\'m a bit confused on the right approach. I want users to skip registration, or auto-register them if they sign in with Facebook. So if th

Answer 1

I suggest you read the framework documentation. Adding a library to CodeIgniter is not a hard task. And Facebook library is no exception.

Here's a quick integration I've just come up with:

1.create a config file:application/config/facebook.php

2.place the sdk files in the libraries folder application/libraries/ and rename the facebook.php file to Facebook.php and replace the php tag with this:

3.in your controller load the config file and then load the Facebook library:

config->load("facebook",TRUE);
        $config = $CI->config->item('facebook');
        $this->load->library('facebook', $config);
    }

    public function index()
    {
        $user = $this->facebook->getUser();
        if($user) {
            try {
                $user_info = $this->facebook->api('/me');
                echo '
'.htmlspecialchars(print_r($user_info, true)).'
';
            } catch(FacebookApiException $e) {
                echo '
'.htmlspecialchars(print_r($e, true)).'
';
                $user = null;
            }
        } else {
            echo "facebook->getLoginUrl()}\">Login using Facebook";
        }
    }
}

Now in the constructor method, you have just initialized the Facebook library (sdk) and it can be accessed by using: $this->facebook.

Notes:

• You can always use an existing library, just google it
• A common practice is to extend the core Controller class and add the Facebook library initialization there.
• Or create another library, extend the Facebook library, load the config file there and then autoload this new library.