WordPress at a glance
function is not described

wp_maybe_update_network_site_counts_on_update() WP 5.1.0

Updates the count of sites for a network based on a changed site.

No Hooks.

Return

Null. Nothing.

Usage

wp_maybe_update_network_site_counts_on_update( $new_site, $old_site );
$new_site(WP_Site) (required)
The site object that has been inserted, updated or deleted.
$old_site(WP_Site/null)
If $new_site has been updated, this must be the previous state of that site.
Default: null

Changelog

Since 5.1.0 Introduced.

Code of wp_maybe_update_network_site_counts_on_update() WP 5.5.2

<?php
function wp_maybe_update_network_site_counts_on_update( $new_site, $old_site = null ) {
	if ( null === $old_site ) {
		wp_maybe_update_network_site_counts( $new_site->network_id );
		return;
	}

	if ( $new_site->network_id != $old_site->network_id ) {
		wp_maybe_update_network_site_counts( $new_site->network_id );
		wp_maybe_update_network_site_counts( $old_site->network_id );
	}
}