function top_comment_authors($amount = 100) {
global $wpdb;
$prepared_statement = $wpdb->prepare(
'SELECT
COUNT(comment_author) AS comments_count, comment_author, comment_author_url, MAX( comment_date ) as last_commented_date
FROM '.$wpdb->comments.'
WHERE comment_author != "" AND comment_type = "" AND comment_approved = 1
GROUP BY comment_author
ORDER BY comments_count DESC, comment_author ASC
LIMIT %d',
$amount);
$results = $wpdb->get_results($prepared_statement);
$output = '
';
foreach($results as $result) {
$output .= '
 '.$result->comment_author.' 共'.$result->comments_count.' 條評論，最后評論 '.human_time_diff(strtotime($result->last_commented_date)).'前
';
}
$output .= '
';
echo $output;
}