这个wp_delete_post() 有pre_delete_post 在删除之前进行筛选，您可以使用它来防止自定义帖子类型被删除。

function prevent_cpt_delete( $delete, $post, $force_delete ) {
  // Is it my post type someone is trying to delete?
  if ( \'my_post_type\' === $post->post_type && ! $force_delete ) {
    // Try to trash the cpt instead
    return wp_trash_post( $post->ID ); // returns (WP_Post|false|null) Post data on success, false or null on failure.
  }
  return $delete;  
}
add_filter(\'pre_delete_post\', \'prevent_cpt_delete\', 10, 3);