WP_Network::get_instance( int $network_id )

Retrieve a network from the database by its ID.

Parameters

$network_id

(int) (Required) The ID of the network to retrieve.

Return

(WP_Network|bool) The network's object if found. False if not.

Source

File: wp-includes/class-wp-network.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 ( ! $_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 ) ) {
				return false;
			}

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

		return new WP_Network( $_network );
	}

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Related

Uses

Uses
Uses Description
wp-includes/class-wp-network.php: WP_Network::__construct()

Create a new WP_Network object.
wp-includes/wp-db.php: wpdb::get_row()

Retrieve one row from the database.
wp-includes/wp-db.php: wpdb::prepare()

Prepares a SQL query for safe execution. Uses sprintf()-like syntax.
wp-includes/cache.php: wp_cache_get()

Retrieves the cache contents from the cache by key and group.
wp-includes/cache.php: wp_cache_add()

Adds data to the cache, if the cache key doesn’t already exist.
wp-includes/load.php: is_wp_error()

Check whether variable is a ClassicPress Error.
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Used By

Used By
Used By Description
wp-includes/ms-load.php: ms_load_current_site_and_network()

Identifies the network and site of a requested domain and path and populates the corresponding network and site global objects as part of the multisite bootstrap process.
wp-includes/ms-blogs.php: get_network()

Retrieves network data given a network ID or network object.

Changelog

Changelog
Version Description
WP-4.4.0 Introduced.