WordPress Version: 4.7
/**
* Retrieves the current network ID.
*
* @since 4.6.0
*
* @return int The ID of the current network.
*/
function get_current_network_id()
{
if (!is_multisite()) {
return 1;
}
$current_network = get_network();
if (!isset($current_network->id)) {
return get_main_network_id();
}
return absint($current_network->id);
}