How to withdraw additional section property to catalog page?

Question

1C-Bitrix

I'm trying to do this:

<? 
$db_list = CIBlockSection::GetList(Array($by=>$order), $arFilter = Array("IBLOCK_ID"=>"12", "ID"=>$arResult["ID"]), true,$arSelect=Array("UF_OPISANIE")); 
while($ar_result = $db_list->GetNext()):   
?> 
<?=$ar_result["UF_OPISANIE"] ?> 
<?endwhile?>

but in this case the only completed Add. section property, for different sections where this property is not filled.
That is, I need the section properties to be displayed on the section page only if it has been filled.

Answer 1

$db_list = CIBlockSection::GetList(Array($by=>$order), $arFilter = Array("IBLOCK_ID"=>"12", "ID"=>$arResult["ID"]), true,$arSelect=Array("UF_OPISANIE"));

You either assign values ​​or pass parameters. Only one thing.

$db_list = CIBlockSection::GetList(Array("SORT"=>"­­ASC"), Array("IBLOCK_ID"=>"12", "ID"=>$arResult["ID"]), false, Array("UF_OPISANIE"));