FileInputUtility::checkFiles

public function checkFiles($controlId, $arFiles)
{
	$arSessionFilesList = $this->getSessionControlFiles($controlId);

	if(is_array($arFiles))
	{
		foreach($arFiles as $key => $fileId)
		{
			if(!in_array($fileId, $arSessionFilesList))
			{
				unset($arFiles[$key]);
			}
		}

		$arFiles = array_values($arFiles);
	}

	return $arFiles;
}