Facebook Graph API, how to get users email?

Question

I'm using the Graph API, but I can't figure out how to get a logged-in users email address.

The intro to Graph states "The Graph API can provide access to all of the basic account registration data you would typically request in a sign-up form for your site, including name, email address, profile picture, and birthday"

All well and good, but how to I access that info?

This is what I have so far:

$json = $facebook->api('/me');

$first = $json['first_name']; // gets first name
$last = $json['last_name'];

Answer 1

https://graph.facebook.com/me

will give you info about the currently logged-in user, but you'll need to supply an oauth token. See:

http://developers.facebook.com/docs/reference/api/user

Answer 2

The only way to get the users e-mail address is to request extended permissions on the email field. The user must allow you to see this and you cannot get the e-mail addresses of the users friends.

http://developers.facebook.com/docs/authentication/permissions

You can do this if you are using Facebook connect by passing req_perms=email in the get string of your connect URL.

I'd recommend using an SDK instead of file_get_contents as it makes it far easier to perform the Oauth authentication.