get_main_network_id │ filter-hook │ WP 4.3.0

Filters the main network ID.

Usage

add_filter( 'get_main_network_id', 'wp_kama_get_main_network_id_filter' );

/**
 * Function for `get_main_network_id` filter-hook.
 * 
 * @param int $main_network_id The ID of the main network.
 *
 * @return int
 */
function wp_kama_get_main_network_id_filter( $main_network_id ){

	// filter...
	return $main_network_id;
}

$main_network_id(int)

The ID of the main network.

Changelog

Where the hook is called

return (int) apply_filters( 'get_main_network_id', $main_network_id );

Where the hook is used in WordPress