Question

I’ve started working on integrated Facebook Connect with my app. I have a slight lack of knowledge problem though.

I can perfectly make it so you log into Facebook Connect on my site, etc, shows your details all FB Connect functions work. But, how do I make it so I can store the facebook user ID into my MySQL database as part of the current users information? So how I can auto log them into Facebook Connect if they have granted access?

Thanks!

Answer 1

Using the PHP Facebook client library, you should be able to add something this at the top of “the page”:

$api_key = "YOUR APP API KEY";
$api_secret = "YOUR API SECRET KEY";

$facebook = new Facebook($api_key, $api_secret);
$facebook_id = $facebook->get_loggedin_user();

If the user is logged in, $facebook_id will be set to their facebook id (BIGINT). If not, it’ll be null. Mind that users need to have third-party cookies enabled in their browser for this to work past the intial “connect” call. In that case you can use the API to get the logged in user:

$facebook->api_client->users_getLoggedInUser();

So basically (pseudo):

if (!is_null($facebook_id))
{
    // authenticate user on your site with local cookie or session
    // pull user data from users table by "$facebook_id"
    // if user isn't in the database, create a new row with their facebook id
}
else
{
    // show the connect button?
}