以下是您的代码：

if ( isset($_GET[\'slug-update\']) ) {

    $posts = get_posts();

    foreach($posts as $singlepost) {
        if($singlepost->post_status === \'publish\'){
            $post_id = $singlepost->ID;
            $current_slug = $singlepost->post_name;
            $updated_slug = $current_slug . \'-word\';
        }

        wp_update_post( array(
            \'ID\' => $post_id,
            \'post_name\' => $updated_slug ) );
    }

    die(\'Slug Updated\');    
}

P、 这将只更新默认的post类型“post”（备份数据库以确保安全）

如果这有帮助，请告诉我。