Кэширования данных (D7) #Bitrix

index.php

<?php
use Bitrix\Main;
use Bitrix\Iblock;

function getNews()
{
    $arNews = [];

    $arQueryParams = [
        'select' => ['*'],
        'filter' => ['IBLOCK.CODE' => 'news'],
        'order' => ['SORT' => 'ASC', 'DATE_CREATE' => 'DESC'],
    ];

    $obCache = Main\Data\Cache::createInstance();

    if ($obCache->initCache($cache_ttl = 86400, $cache_id = serialize($arQueryParams), 'Example'))
    {
        $arNews = $obCache->GetVars();
    }
    elseif ($obCache->startDataCache())
    {
        try {
            $rsResult = Iblock\ElementTable::getList($arQueryParams);

            if (! $rsResult->getSelectedRowsCount()) {
                throw new \Exception('К сожалению, ничего не найдено');
            }

            $arNews = $rsResult->fetchAll();
            $obCache->endDataCache($arNews);
        }
        catch (\Exception|Main\ArgumentException $e)
        {
            $obCache->abortDataCache();
        }
    }

    return $arNews;
}