WordPress at a glance
function is not described

WP_Network::get_instance() public WP 4.4.0

Retrieve a network from the database by its ID.

{} It's a method of the class: WP_Network{}

No Hooks.

Return

WP_Network|false. The network's object if found. False if not.

Usage

$result = WP_Network::get_instance( $network_id );
$network_id(int) (required)
The ID of the network to retrieve.

Notes

  • Global. wpdb. $wpdb WordPress database abstraction object.

Changelog

Since 4.4.0 Introduced.

Code of WP_Network::get_instance() WP 5.7

<?php
public static function get_instance( $network_id ) {
	global $wpdb;

	$network_id = (int) $network_id;
	if ( ! $network_id ) {
		return false;
	}

	$_network = wp_cache_get( $network_id, 'networks' );

	if ( false === $_network ) {
		$_network = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM {$wpdb->site} WHERE id = %d LIMIT 1", $network_id ) );

		if ( empty( $_network ) || is_wp_error( $_network ) ) {
			$_network = -1;
		}

		wp_cache_add( $network_id, $_network, 'networks' );
	}

	if ( is_numeric( $_network ) ) {
		return false;
	}

	return new WP_Network( $_network );
}