Hi for me快速解决方案是使用自定义查询

对于eg。

$sql="SELECT
    `wp_users`.`ID`
    , `wp_users`.`user_login`
    , `wp_users`.`user_pass`
    , `wp_users`.`user_nicename`
    , `wp_users`.`user_email`
    , `wp_users`.`user_url`
    , `wp_users`.`user_registered`
    , `wp_users`.`user_activation_key`
    , `wp_users`.`user_status`
    , `wp_users`.`display_name`
    , `wp_posts`.`post_date`
FROM
    `wp_users`
    LEFT JOIN `wp_posts` 
        ON (`wp_users`.`ID` = `wp_posts`.`post_author`)
GROUP BY `wp_users`.`ID`
ORDER BY `wp_posts`.`post_date` DESC;";

global $wpdb;
$results=$wpdb->get_results($sql);
foreach($results as $result) {
    echo $result->ID; //and so on
}