_update_blog_date_on_post_delete() WordPress Function

function _update_blog_date_on_post_delete( $post_id ) {
	$post = get_post( $post_id );

	$post_type_obj = get_post_type_object( $post->post_type );
	if ( ! $post_type_obj || ! $post_type_obj->public ) {
		return;
	}

	if ( 'publish' !== $post->post_status ) {
		return;
	}

	wpmu_update_blogs_date();
}
Uses	Description
wp-includes/post.php:get_post()	Retrieves post data given a post ID or post object.
wp-includes/post.php:get_post_type_object()	Retrieves a post type object by name.
wp-includes/ms-blogs.php:wpmu_update_blogs_date()	Update the last_updated field for the current site.