do_action( 'before_populate_network', int $network_id, string $domain, string $email, string $site_name, string $path, bool $subdomain_install )

1016<?php1017	 * @param string $domain            The domain name for the network.1018	 * @param string $email             Email address for the network administrator.1019	 * @param string $site_name         The name of the network.1020	 * @param string $path              The path to append to the network's domain name.1021	 * @param bool   $subdomain_install Whether the network is a subdomain installation or a subdirectory installation.1022	 */1023	do_action( 'before_populate_network', $network_id, $domain, $email, $site_name, $path, $subdomain_install );1024 1025	$errors = new WP_Error();1026	if ( '' === $domain ) {1027		$errors->add( 'empty_domain', __( 'You must provide a domain name.' ) );1028	}1029	if ( '' === $site_name ) {