php code umschreiben

<li><h2>Letzte Kommentare</h2>
    <ul id="recent_comments">
        <?php
        global $wpdb;
        $sql = "SELECT DISTINCT ID, post_title, post_password, comment_ID, comment_post_ID,
        SUBSTRING(comment_content,1,80) AS com_excerpt
        FROM $wpdb->comments
        LEFT OUTER JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID =
        $wpdb->posts.ID)
        WHERE comment_approved = '1' AND comment_type = '' AND
        post_password = ''
        ORDER BY comment_date DESC
        LIMIT 4";
        $comments = $wpdb->get_results($sql);
        $output = $pre_HTML;
        foreach ($comments as $comment) {
        $output .= "\n<li><a href=\"" . get_permalink($comment->ID) .
        "#comment-" . $comment->comment_ID . "\" title=\"on " .
        $comment->post_title . "\">" .strip_tags($comment->com_excerpt).
        "...</a>";
        }
        $output .= $post_HTML;
        echo $output;?>
    </ul> <!-- END -->
</li>