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How-to Guides

Technical References

Multisites /

Multiple domains

By default, VIP Go enforces the use of a single domain per site in a multisite (notably, this is not exactly the same as core multisite, which will cause a domain not associated with any site in the network to resolve to site_id 1.) Some VIPs have found it useful to allow multiple domains to resolve to a single site in the network either temporarily or permanently. In the below example from client-sunrise.php, this multi-domain configuration is limited to REST API requests, but it could be more general, or differently targeted.

// Allow REST API requests to be served on one of several domains.
$clientslug_custom_sunrise_domains = array( '', '', '' );

// Cause each of these domains to load `site_id` 1.
$clientslug_custom_sunrise_site_id = 1;

if ( isset( $_SERVER['HTTP_HOST'], $_SERVER['REQUEST_URI'] )
	 && in_array( $_SERVER['HTTP_HOST'], $clientslug_custom_sunrise_domains, true )
	 && 0 === strpos( $_SERVER['REQUEST_URI'], '/wp-json' ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized, this is safe here.
) {
	// These domains are each associated with `site_id` 1 of network 1.
	$current_blog = get_site( $clientslug_custom_sunrise_site_id ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

	// This should always be 1, unless you are running multiple WordPress networks.
	$current_site = get_network( 1 ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

Other uses of client-sunrise.php might include logic around redirects (that don’t require database lookups) or other manipulation of fundamental WordPress constants or globals based on the request. See our documentation on this file.

Last updated: April 09, 2021