Фильтр в поиске

$arrF = array( 
   "><DATE_CHANGE" => 
        Array(date('Y-m-d 00:00:00',mktime(0,0,0,1,1,2003)), date('Y-m-d 00:00:00',mktime(0,0,0,1,1,2004))))

$arFilter = array(
    "SITE_ID" => SITE_ID,
    "QUERY" => $arResult["REQUEST"]["~QUERY"],
    "TAGS" => $arResult["REQUEST"]["~TAGS"],
);
if(strlen($where)>0)
{
    list($module_id, $part_id) = explode("_",$where,2);
    $arFilter["MODULE_ID"] = $module_id;
    if(strlen($part_id)>0) $arFilter["PARAM1"] = $part_id;
}
if($arParams["CHECK_DATES"])
    $arFilter["CHECK_DATES"]="Y";

$obSearch = new CSearch();
$obSearch->Search($arFilter, $aSort, $exFILTER);

$arResult["ERROR_CODE"] = $obSearch->errorno;
$arResult["ERROR_TEXT"] = $obSearch->error;

$arResult["SEARCH"] = array();
if($obSearch->errorno==0)
{
    $obSearch->NavStart($arParams["PAGE_RESULT_COUNT"], false);

$arFilter = array(
    "SITE_ID" => SITE_ID,
    "QUERY" => $arResult["REQUEST"]["~QUERY"],
    "TAGS" => $arResult["REQUEST"]["~TAGS"],
    "><DATE_CHANGE" => 
        Array(date($DB->DateFormatToPHP(CLang::GetDateFormat("FULL")), mktime(0,0,0,1,1,2003)), 
              date($DB->DateFormatToPHP(CLang::GetDateFormat("FULL")), mktime(0,0,0,1,1,2004)))
);