Подсчет количества элементов в инфоблоке

$cnt = CIBlockElement::GetList(
    array(),
    array('IBLOCK_ID' => xx, .....),
    array(),
    false,
    array('ID', 'NAME')
); 

echo $cnt;

$sql = "SELECT COUNT(id_incident) FROM erp_incedent WHERE
id_org = '2' AND
TO_DAYS(NOW()) - TO_DAYS(date) <= 30";
$res=$DB->Query($sql);
$arr=$res->Fetch_Row;
echo $arr[0];

CModule::IncludeModule('iblock');
$arFilter = array(
    'IBLOCK_ID' => 123, // ID инфоблока
    // любые другие параметры, например 'ACTIVE' => 'Y'
);
$res = CIBlockElement::GetList(false, $arFilter, array('IBLOCK_ID'));
if ($el = $res->Fetch())
    echo 'Записей: '.$el['CNT'];

$arSelect = Array("ID", "IBLOCK_ID", "NAME","PROPERTY_*");

$arFilter = Array("IBLOCK_ID"=>IntVal(107), "ACTIVE"=>"Y", "!PROPERTY_PROP_VALUE"=>"y");

$res = CIBlockElement::GetList(Array(), $arFilter, false, Array("nPageSize"=>10), $arSelect);

$res->NavStart();

$all = $res->NavRecordCount;

echo $all;

$cnt = CIBlockElement::GetList(false, $arFilter, array('IBLOCK_ID'))->Fetch()['CNT'];