block_core_calendar_update_has_published_post_on_transition_post_status

block_core_calendar_update_has_published_post_on_transition_post_status: 这个函数用来在一个文章状态改变时，更新指定日期的has_published_posts元值。它接受文章ID、旧状态和新状态作为参数。

当一个文章的状态改变时，更新已发布文章标志的处理程序。

function block_core_calendar_update_has_published_post_on_transition_post_status( $new_status, $old_status, $post ) {
		if ( $new_status === $old_status ) {
			return;
		}

		if ( 'post' !== get_post_type( $post ) ) {
			return;
		}

		if ( 'publish' !== $new_status && 'publish' !== $old_status ) {
			return;
		}

		block_core_calendar_update_has_published_posts();
	}

	add_action( 'delete_post', 'block_core_calendar_update_has_published_post_on_delete' );
	add_action( 'transition_post_status', 'block_core_calendar_update_has_published_post_on_transition_post_status', 10, 3 );
}