<?php
$_SERVER['DOCUMENT_ROOT']="/home/bitrix/www";

define("NO_KEEP_STATISTIC", true);
define("NOT_CHECK_PERMISSIONS", true);

// подгружаем пролог
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

// отключаем таймаут
set_time_limit(0);

// ограничения по памяти
ini_set('memory_limit', '2048M');

// выполняем все действия от админа битрикса
global $USER;
$USER->Authorize(1);
CModule::IncludeModule('iblock');

$start = microtime(true);

$iblock_ids = array(2,1,3); // id инфоблоков для считывания

$arSelect = array(
    "IBLOCK_NAME",
    "ID",
    "NAME",
    "IBLOCK_SECTION_ID",
    "PROPERTY_22", // Код производителя товара ELKO (manufacturerCode)
    "PROPERTY_3", // Артикул Treolan (articul)
    "PROPERTY_31", // Номер партии OCS (PartNumber)
);

// Выборка элементов указанных инфоблоков
$rsElement = CIBlockElement::GetList(array(), array("IBLOCK_ID" => $iblock_ids, "SECTION_ACTIVE" => "Y", "SECTION_GLOBAL_ACTIVE" => "Y"), false, false, $arSelect);
while($arElement = $rsElement->Fetch())
{
    $elems[$arElement["IBLOCK_NAME"]][] = $arElement;
}

// Массивы с элементами инфоблоков
$elkoArr = $elems["ELKO"];
$treolanArr = $elems["Treolan"];
$ocsArr = $elems["OCS"];

function getSectionsList($filter) {
    // Выборка разделов указанных инфоблоков
    $dbSection = CIBlockSection::GetList(array(), $filter, false);
    while( $arSection = $dbSection-> GetNext() ){
       $sections[] = $arSection;
    }
    return $sections;
}

// Функция
function search($array, $key, $value)
{
    $results = array();

    if (is_array($array))
    {
        if (isset($array[$key]) && $array[$key] == $value)
            $results[] = $array;

        foreach ($array as $subarray)
            $results = array_merge($results, search($subarray, $key, $value));
    }

    return $results;
}

function getInfoSectionByID($id) {
    $res = CIBlockSection::GetByID($id);
    if($arRes = $res->Fetch())
    {
        return $arRes;
    }
}

function createTreeSections($iblock_id, $el_id, $sec_id) {
    $sec_element = CIBlockElement::GetElementGroups($el_id, true)->Fetch();
    $resSection = CIBlockSection::GetNavChain(false, $sec_element['ID'], [
        'NAME','ID','CODE','IBLOCK_SECTION_ID'
    ]);
    while ($arSection = $resSection->GetNext()) {
        $array_sections[] = $arSection;
    }

    foreach($array_sections as $section) {
        $sectionObject = new CIBlockSection;

        $sectionId = $sectionObject->Add([
            'IBLOCK_ID' => $iblock_id,
            'IBLOCK_SECTION_ID' => '',
            "NAME" => $section['NAME'],
            "CODE" => $section['CODE'].'_non',
        ]);

        if($sectionId > 0){
            $sectionObject->Update($sectionId, [
                'IBLOCK_ID' => $iblock_id,
                'IBLOCK_SECTION_ID' => '',
                "NAME" => $section['NAME'],
                "CODE" => $section['CODE'].'_non',
            ]);
        };
    }
}

print_r(createTreeSections(1, 1174964, 14615));

/*foreach ($elkoArr as $k => $elkoItem) {
    if (empty(search($ocsArr, 'PROPERTY_31_VALUE', $elkoItem['PROPERTY_22_VALUE']))) {
        $countElko++;

    }
}

foreach ($treolanArr as $treolanItem) {
    if (empty(search($ocsArr, 'PROPERTY_31_VALUE', $treolanItem['PROPERTY_3_VALUE']))) {
        $countTreolan++;
    }
}*/

echo $countElko."\n";
echo $countTreolan."\n";

$finish = microtime(true);
$delta = $finish - $start;
echo round($delta, 2)." сек. \n";