Zend\Diactoros\Uri::withFragment PHP Method

    public function withFragment($fragment)
    {
        if (!is_string($fragment)) {
            throw new InvalidArgumentException(sprintf('%s expects a string argument; received %s', __METHOD__, is_object($fragment) ? get_class($fragment) : gettype($fragment)));
        }
        $fragment = $this->filterFragment($fragment);
        if ($fragment === $this->fragment) {
            // Do nothing if no change was made.
            return clone $this;
        }
        $new = clone $this;
        $new->fragment = $fragment;
        return $new;
    }