Zend\Diactoros\Uri::withPort PHP Method

    public function withPort($port)
    {
        if (!is_numeric($port) && $port !== null) {
            throw new InvalidArgumentException(sprintf('Invalid port "%s" specified; must be an integer, an integer string, or null', is_object($port) ? get_class($port) : gettype($port)));
        }
        if ($port !== null) {
            $port = (int) $port;
        }
        if ($port === $this->port) {
            // Do nothing if no change was made.
            return clone $this;
        }
        if ($port !== null && $port < 1 || $port > 65535) {
            throw new InvalidArgumentException(sprintf('Invalid port "%d" specified; must be a valid TCP/UDP port', $port));
        }
        $new = clone $this;
        $new->port = $port;
        return $new;
    }