我是一个多作者博客的管理员。我正在实施一个监控系统，如果我认为某个用户是垃圾邮件帐户，或者他们违反了网站规则，我需要将该用户从“作者”（此角色允许他们发表自定义帖子）降级为“读者”角色。

在使用管理屏幕更改了他们的角色后，我如何才能使他们发表的所有帖子自动删除，而不必滚动并自己查找它们？

非常感谢

EDIT using advice from answers below:

add_action( \'set_user_role\', \'wpse98904_remove_demoted_user_posts\', 10, 2 );
function wpse98904_remove_demoted_user_posts( $demoted_author_id, $role ) {
 // In here you\'d search for all the posts by the user

 $args = array(
            \'numberposts\' => -1,
            \'author\' => $demoted_author_id,
            \'post_type\' => \'custom_post\',
            // So if your custom post type is named \'xyz_book\', then use:
            // \'post_type\' => \'xyz_book\',
 );
 $demoted_author_posts = get_posts( $args );
 foreach( $demoted_author_posts as $p ) {
     // delete the post (actually Trash it)
     if($role == \'subscriber\') {
     wp_trash_post( $p->ID);
     // To force the deletion (ie, bypass the Trash):
     // wp_delete_post( $p->ID, true );
     }
 }
}

我使用wp\\u trash\\u post来丢弃事件，因为在wp\\u delete\\u post中添加“false”对我不起作用。

add_action( \'set_user_role\', \'wpse98904_remove_demoted_user_posts\', 10, 2 );
function wpse98904_remove_demoted_user_posts( $demoted_author_id, $role ) {
     if( \'subscriber\' == $role ) {
         // In here you\'d search for all the posts by the user
         $args = array(
                \'numberposts\' => -1,
                \'author\' => $demoted_author_id,
                \'post_type\' => \'{your custom post type name}\',
                // So if your custom post type is named \'xyz_book\', then use:
                // \'post_type\' => \'xyz_book\',
         );
         $demoted_author_posts = get_posts( $args );
         foreach( $demoted_author_posts as $p ) {
             // delete the post (actually Trash it)
             wp_delete_post( $p->ID );
             // To force the deletion (ie, bypass the Trash):
             // wp_delete_post( $p->ID, true );
         }
     }
}

add_action(\'set_user_role\',\'myfunc\',10,2);
function myfunc($user_id,$role) {
    if($role == \'subscriber\') { // or whatever you want
        $posts = get_posts(\'numberposts=-1&author=\'.$user_id);
        foreach($posts as $post) {
            wp_delete_post($post->ID,true);
        }
    }
}