WordPress at a glance
function is not described

wp_update_network_site_counts() WP 3.7.0

Update the network-wide site count.

  • Since 4.8.0 The $network_id parameter has been added.

No Hooks.

Return

Nothing (null).

Usage

wp_update_network_site_counts( $network_id );
$network_id(int/null)
ID of the network.
Default: current network

Code of wp update network site counts: wp-includes/ms-functions.php VER 5.0.3

<?php
function wp_update_network_site_counts( $network_id = null ) {
	$network_id = (int) $network_id;
	if ( ! $network_id ) {
		$network_id = get_current_network_id();
	}

	$count = get_sites( array(
		'network_id' => $network_id,
		'spam'       => 0,
		'deleted'    => 0,
		'archived'   => 0,
		'count'      => true,
	) );

	update_network_option( $network_id, 'blog_count', $count );
}