Iri::__wakeup()

	public function __wakeup() {
		$class_props = get_class_vars( __CLASS__ );
		$string_props = array( 'scheme', 'iuserinfo', 'ihost', 'port', 'ipath', 'iquery', 'ifragment' );
		$array_props = array( 'normalization' );
		foreach ( $class_props as $prop => $default_value ) {
			if ( in_array( $prop, $string_props, true ) && ! is_string( $this->$prop ) ) {
				throw new UnexpectedValueException();
			} elseif ( in_array( $prop, $array_props, true ) && ! is_array( $this->$prop ) ) {
				throw new UnexpectedValueException();
			}
			$this->$prop = null;
		}
	}