WP_Network::get_main_site_id()
Method: Returns the main site ID for the network.
Source: wp-includes/class-wp-network.php:219
Method: Returns the main site ID for the network.
Source: wp-includes/class-wp-network.php:219
Filter Hook: Filters the main site ID.
Source: wp-includes/class-wp-network.php:230
Method: Sets the site name assigned to the network if one has not been populated.
Source: wp-includes/class-wp-network.php:286