mass update iblock elements

iblockUpdate

<?php

CModule::IncludeModule('iblock');
$rsElements = CIBlockElement::GetList([
        'NAME' => 'DESC'
    ], [
        'IBLOCK_ID' => 13,
        'SECTION_ID' => 80
    ]);

$element = new CIBlockElement;
while ($el = $rsElements->GetNext()) {
    $res = $element->SetPropertyValuesEx($el['ID'], $el['IBLOCK_ID'], [
            'YES_OR_NOT' => 3
        ]);
    printf("%-11s => %-12s  %s\n", $el['NAME'], $n_name, $res);
}

?>