我使用此代码来防止添加重复的帖子，但我也需要防止重复页面。有人能帮忙吗？

function clearDuplicatePosts(){
    global $wpdb;
    $prefix = $wpdb->prefix;
    $wpdb->query("DELETE bad_rows . * FROM ".$prefix."posts AS bad_rows INNER JOIN (
    SELECT ".$prefix."posts.post_title, MIN( ".$prefix."posts.ID ) AS min_id
    FROM ".$prefix."posts
    GROUP BY post_title
    HAVING COUNT( * ) >1
    ) AS good_rows ON ( good_rows.post_title = bad_rows.post_title
    AND good_rows.min_id <> bad_rows.ID )");
} 
add_action(\'publish_post\', \'clearDuplicatePosts\');