如果要删除大量用户，可以使用wp user delete wp-cli 命令以避免脚本超时。

Here\'s 删除所有用户的SQL查询示例without posts of any type and status.

因此，您可以尝试使用未经测试的一行程序：

wp user delete $(wp db query "SELECT ID FROM wp_users WHERE ID NOT IN (SELECT DISTINCT post_author FROM wp_posts ) AND ID NOT IN (1,2,3)" | tail -n +2 ) --reassign=1

wp user delete $(wp db query
    "SELECT ID  
         FROM wp_users   
         WHERE ID NOT IN (  
            SELECT DISTINCT post_author FROM wp_posts 
         ) AND ID NOT IN (1,2,3)" | tail -n +2 
  ) --reassign=1

当我为几个用户简要测试时，我注意到我必须添加tail -n +2 部分以避免标题和表格边框中的前3行wp db query 输出

在此，我们将所有帖子重新分配给用户1，以避免出现通知：

--reassign parameter not passed. All associated posts will be deleted. Proceed? [y/n] 

Note: 请记住在测试前备份！

这里有一种用PHP实现的方法。它可能会很慢和/或超时，但由于这是一次性的，所以不应该太重要。暂时放置在函数内部。php或作为新插件上载。

//* You don\'t want to run this on admin_init. Run it once and deactivate
add_action( \'admin_init\', \'wpse_262100_admin_init\' );
function wpse_262100_admin_init() {
  $reserved_post_types = [
    \'attachment\',
    \'revision\',
    \'nav_menu_item\',
    \'custom_css\',
    \'customize_changeset\',
  ];

  //* Get the non-reserved post types
  $post_types = array_diff( array_keys( get_post_types() ), $reserved_post_types );
  foreach( get_users() as $user ) {
    if( 0 == count_user_posts( $user->ID, $post_types ) ) {
      wp_delete_user( $user->ID );
    }
  }
}

根据您提到的旧插件的源代码判断，它没有考虑的帖子类型有attachment 和revision. 我认为您可以通过从插件文件no posts user delete的源代码中删除它来轻松修复此问题。php

    AND NOT WP.post_type in (\'attachment\', \'revision\')