public static function likeButton($id)
    {
        if (! is_user_logged_in()) {
            return;
        }

        $likes = get_comment_meta($id, '_likes', true);

        if (empty($likes) || is_array($likes) == false) {
            $count = 0;
        } else {
            $count = count($likes);
        }

        $classes = array('like-button');

        if (is_array($likes) == true && in_array(get_current_user_id(), $likes)) {
            $classes[] = 'active';
        }

        $output = '<a class="' . implode(' ', $classes) . '" href="javascript:void(0)" data-comment-id="' . $id . '">';
        $output .= '<span id="like-count">' . $count . '</span>';
        $output .= '</a>';

        return $output;
    }