正如Peattie先生和Nowell先生所指出的，您应该将检查帖子类型作为save_post 作用

这里有几种方法，

add_action( \'save_post\', \'prefix_my_save_post_action\', 10, 3 );
function prefix_my_save_post_action( $post_id, $post, $update ) {

  // Check for single post type
  if ( \'my_post_type\' !== $post->post_type ) {
    return;
  }

  // Check multiple post types with in_array()
  $valid_post_types = array(
    \'post\' => true,
    \'page\' => true,
    \'post_type_a\' => true,
    \'post_type_b\' => true
  );
  if ( ! in_array( $post->post_type, $valid_post_types ) ) {
    return;
  }
  // or with isset() <-- uses array keys
  if ( ! isset( $valid_post_types[$post->post_type] ) ) {
    return;
  }

  // Do stuff
}

add_action( \'save_post_my_post_type\', \'prefix_my_save__cpt_post_action\', 10, 3 );
function prefix_my_save_post_action( $post_id, $post, $update ) {
  // No need to check for post type as it is already in the action
  // Do stuff
}