Upload collection img

//title: Присваивание картинок
\Bitrix\Main\Loader::includeModule('iblock');

function rbsCheckDir($dirPath, $dirName)
{
    $collectionDir = $_SERVER["DOCUMENT_ROOT"]."/upload/collection_images/";
    return is_dir($collectionDir.$dirPath) && $dirName != '.' && $dirName != '..';
}

$collectionDirSourse = $_SERVER["DOCUMENT_ROOT"]."/upload/collection_images/";
$ib = 17;
$dir = opendir($collectionDirSourse);
$arLog = [];
while($brand = readdir($dir))
{
    if(rbsCheckDir($brand, $brand))
    {
        $brandDb = CIblockSection::GetList(['ID' => 'asc'], ['IBLOCK_ID' => $ib, '=NAME' => $brand], false, ['ID', 'NAME']);
        $brandDir = opendir($collectionDirSourse.$brand);

        while($obBrand = $brandDb->GetNext())
        {
            $collectionImg = false;
            while($collection = readdir($brandDir))
            {
                if(rbsCheckDir($brand.'/'.$collection, $collection))
                {
                    $collDb = CIblockSection::GetList(['ID' => 'asc'], ['IBLOCK_ID' => $ib, '=NAME' => $collection, 'IBLOCK_SECTION_ID' => $obBrand['ID']], false, ['ID', 'NAME']);
                    $collectionDir = opendir($collectionDirSourse.$brand.'/'.$collection.'/web/');
                    while($obCol = $collDb->GetNext())
                    {
                        while($image = readdir($collectionDir))
                        {
                            if(strpos($image, '.jpg') !== false)
                            {
                                $dbElem = CIblockElement::GetList([],
                                    ['IBLOCK_ID' => $ib, '=CODE' => str_replace('.jpg', '', $image), 'IBLOCK_SECTION_ID' => $obCol['ID']], false, false,
                                    ['ID', 'NAME', 'CODE']);
                                if($obElem = $dbElem->GetNext())
                                {
                                    $el = new CIBlockElement;
                                    $picPath = $collectionDirSourse.$brand.'/'.$collection.'/web/'.$image;
                                    $fileArray = CFile::MakeFileArray($picPath);
                                    $arLoadProductArray = array(
                                        "PREVIEW_PICTURE" => $fileArray,
                                        "DETAIL_PICTURE" => $fileArray,
                                    );
                                    //print_r($fileArray);
                                    if(!$el->Update($obElem['ID'], $arLoadProductArray))
                                        $arLog[$obElem['ID']] = $el->LAST_ERROR;
                                }
                            }
                        }
                    }
                }
            }
        }
   }
}

print_r($arLog);