WORDPRESS Количество лайков по URL

gistfile1.php

<?php

/*
 * Кол-во лайков по URL
 */

function getFBLikes($postID){
    $cache = get_transient('likes_' . $postID);
    if ( empty( $cache ) ){
        $url = get_permalink($postID);
        $result = json_decode(file_get_contents("http://api.facebook.com/method/fql.query?query=select%20total_count%20from%20link_stat%20where%20url='$url'&format=json"));;
        set_transient('likes_' . $postID, $result[0]->total_count, 3600);
        return $result[0]->total_count;
    } else {
        return $cache;
    }
}