function ZbTool_delete_post_attachments($post_id) {
    // 获取所有与文章关联的附件
    $attachments = get_posts(array(
        'post_parent'    => $post_id,
        'post_type'      => 'attachment',
        'posts_per_page' => -1,
        'post_status'    => null,
        'post_mime_type' => ''
    ));

    foreach ($attachments as $attachment) {
        // 删除每个附件
        wp_delete_attachment($attachment->ID, true);
    }
}
add_action('before_delete_post', 'ZbTool_delete_post_attachments');