Neos\Flow\Mvc\DispatchComponent::mergeArguments PHP Method

    protected function mergeArguments(HttpRequest $httpRequest, array $routingMatchResults = null)
    {
        $arguments = $this->parseRequestBody($httpRequest);
        // HTTP arguments (e.g. GET parameters)
        $arguments = Arrays::arrayMergeRecursiveOverrule($httpRequest->getArguments(), $arguments);
        // Routing results
        if ($routingMatchResults !== null) {
            $arguments = Arrays::arrayMergeRecursiveOverrule($arguments, $routingMatchResults);
        }
        return $arguments;
    }