ProjectCleverWeb / PHP-URI

		 * @param  string $str     The modfication

		 * @return string|false    Returns the resulting URI on success, FALSE otherwise

		 */

		public static function scheme_symbols(&$object, $action, $str) {

			$org = $object->scheme_symbols;

			\uri\actions::callback($object, $action, __FUNCTION__, $str);

			if (!(preg_match('/\A(:)?([\/]{2,3})?\Z/', $object->scheme_symbols) || empty($str))) {

				$object->scheme_symbols = $org;

				return FALSE;

			}

			return \uri\generate::string($object);

		}

		/**

		 * Modfies the Scheme

		 * @param  string $str     The modfication

		 * @return string|false    Returns the resulting URI on success, FALSE otherwise

		 */

		public static function host(&$object, $action, $str) {

			$org = $object->host;

			\uri\actions::callback($object, $action, __FUNCTION__, $str);

			if ((

				!preg_match('/\A(([a-z0-9_]([a-z0-9\-_]+)?)\.)+[a-z0-9]([a-z0-9\-]+)?\Z/i', $object->host) // fqdn

				&&

				!preg_match('/\A([0-9]\.){3}[0-9]\Z/i', $object->host) // ip

			)) {

				$object->host = $org;

				return FALSE;

			}

			return \uri\generate::string($object);

		}

		/**

		 * Alias of host()