<?php session_start();
require "lib/Yahoo.inc";

define("OAUTH_CONSUMER_KEY", "");
define("OAUTH_CONSUMER_SECRET", "");
define("OAUTH_APP_ID", "");

$userdata_session = YahooSession::requireSession(OAUTH_CONSUMER_KEY, OAUTH_CONSUMER_SECRET, OAUTH_APP_ID);

$userdata = $userdata_session -> getSessionedUser();
$profile = $userdata -> getProfile();
$nickname = $profile -> nickname;
$guid = $profile -> guid;
?>