function wpt_facebook_comment_tweet($id, $comment)
{
    $approved = $comment->comment_approved;
    $url = $comment->comment_author_url;
    if ($approved == 1 && strpos($url, '//www.facebook.com') !== false) {
        wpt_set_comment_tweet($id, 1);
    }
}
function wpt_disqus_comment_tweet($id, $comment)
{
    $approved = $comment->comment_approved;
    $agent = $comment->comment_agent;
    if ($approved == 1 && strpos($agent, 'Disqus') !== false) {
        wpt_set_comment_tweet($id, 1);
    }
}