WordPress Version: 6.1
/**
* Gets the number of active sites on the installation.
*
* The count is cached and updated twice daily. This is not a live count.
*
* @since MU (3.0.0)
* @since 3.7.0 The `$network_id` parameter has been deprecated.
* @since 4.8.0 The `$network_id` parameter is now being used.
*
* @param int|null $network_id ID of the network. Default is the current network.
* @return int Number of active sites on the network.
*/
function get_blog_count($network_id = null)
{
return get_network_option($network_id, 'blog_count');
}