Script::grabParameters

private function grabParameters(array $templateParameters, array $parameters): array
{
	$parameters += $this->getFileParameters();

	foreach (array_keys($templateParameters) as $paramId)
	{
		if (!array_key_exists($paramId, $parameters) && $this->request->getPost($paramId) !== null)
		{
			$parameters[$paramId] = $this->request->getPost($paramId);
		}
	}

	return $parameters;
}