is_main_site() WP 1.0

Determine whether a site is the main site of the current network.

No Hooks.

Return

true/false. True if $site_id is the main site of the network, or if not running Multisite.

Usage

is_main_site( $site_id, $network_id );

$site_id(int)

Site ID to test.
Default: current site

$network_id(int)

Network ID of the network to check for.
Default: current network

Changelog

Code of is main site: wp-includes/functions.php ^{WP 5.4.2}

<?php
function is_main_site( $site_id = null, $network_id = null ) {
	if ( ! is_multisite() ) {
		return true;
	}

	if ( ! $site_id ) {
		$site_id = get_current_blog_id();
	}

	$site_id = (int) $site_id;

	return get_main_site_id( $network_id ) === $site_id;
}

Related Functions

From category: Multisite