How to make a detail type change through a loop?

Question

PHP

There is data pulled from the database and saved to a csv file.
When importing a detailed description, no matter how html tried to do it, it was still text.
I found a way that did the transformation of the detailed text, but for me it only works when entering the element and updating it. I have over a hundred. how to make the changes go through the cycle?
here is the code

if ($arResult["DETAIL_TEXT_TYPE"]!=="html") {
    $el = new CIBlockElement;
    $arLoadProductArray = Array(
        "DETAIL_TEXT_TYPE" => "html",
    );
    $res = $el->Update($arResult["ID"], $arLoadProductArray);
}
?>

Answer 1

As far as I remember, bitrix does not know how to change/remove infoblock elements with one request.
The option here is to select the required elements via CIBlockElement::GetList(), and then in a loop to perform a change in the type of a detailed description. Yes, this is not optimal, but if this is a one-time processing, then it is quite possible to do it.
The second option is to make a change directly in the database table, without using the infoblock api. In this case, see the structure of the b_iblock_element table. But after this, at least you need to reset the cache. In general, the official documentation does not recommend working directly with the database.