public function get_domain() {

			$domain = self::$domain;

			if ( empty( $domain ) ) {
				if ( isset( $_SERVER['SERVER_NAME'] ) ) {
				    $domain = $_SERVER['SERVER_NAME'];
				}

				if ( is_multisite() ) {
					// For multisite, return the network-level siteurl
					$domain = $this->get_network_domain();
				}

				self::$domain = $domain;
			}

			return $domain;

		}