This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

WP_Network_Query::set_found_networks()

Populates found_networks and max_num_pages properties for the current query if the limit clause was used.

Source

File: wp-includes/class-wp-network-query.php 

	private function set_found_networks() {
		global $wpdb;

		if ( $this->query_vars['number'] && ! $this->query_vars['no_found_rows'] ) {
			/**
			 * Filters the query used to retrieve found network count.
			 *
			 * @since WP-4.6.0
			 *
			 * @param string           $found_networks_query SQL query. Default 'SELECT FOUND_ROWS()'.
			 * @param WP_Network_Query $network_query        The `WP_Network_Query` instance.
			 */
			$found_networks_query = apply_filters( 'found_networks_query', 'SELECT FOUND_ROWS()', $this );

			$this->found_networks = (int) $wpdb->get_var( $found_networks_query );
		}
	}

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Related

Uses

Uses
Uses Description
wp-includes/class-wp-network-query.php: found_networks_query

Filters the query used to retrieve found network count.
wp-includes/wp-db.php: wpdb::get_var()

Retrieve one variable from the database.
wp-includes/plugin.php: apply_filters()

Call the functions added to a filter hook.

Changelog

Changelog
Version Description
WP-4.6.0 Introduced.