is_main_site() WP 1.0
Determine whether a site is the main site of the current network.
1 time — 0.000013 sec (very fast) | 50000 times — 0.045192 sec (speed of light)
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
| Since 3.0.0 | Introduced. |
| Since 4.9.0 | The $network_id parameter was added. |
Code of is_main_site() is main site WP 5.8.1
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;
}