How to select infoblock elements by date greater than a certain one?

Question

1C-Bitrix

Good day.

There is an infoblock, there are elements, I needed to parse the elements for the current day

$arSelect = Array("ID", "NAME", "DATE_ACTIVE_FROM", "DATE_CREATE");
$arFilter = Array("IBLOCK_ID"=>16, "PROPERTY_ID_VK" => "", "ACTIVE" => "Y", ">=DATE_ACTIVE_FROM" => date("Y-m-d")." 00:00:00");
$res = CIBlockElement::GetList(Array(), $arFilter, false, Array("nPageSize"=>100), $arSelect);
while($ob = $res->GetNextElement())
  {
    $arFields = $ob->GetFields();
  ?><pre><?print_r($arFields)?></pre><?

but for some reason it displays all elements with an empty property "PROPERTY_ID_VK"

Answer 1

// чтобы получить дату в формате сайта (в битриксе)
$date = date('Y-m-d');
$timestamp = MakeTimeStamp($date, 'YYYY-MM-DD');
$convertDateTime = ConvertTimeStamp($timestamp);

$arFilter = Array("IBLOCK_ID"=>16, "PROPERTY_ID_VK" => false, "ACTIVE" => "Y", ">=DATE_ACTIVE_FROM" => $convertDateTime);