<?php
    if (CModule::IncludeModule("iblock")) {

        $sqlResult = CIBlockElement::GetList(
            $by = [
                "SORT"=>"ASC"
            ],
            $filter = [
                'IBLOCK_ID' => 999
            ],
            $arGroupBy = false,
            $arNavStartParams = false,
            $arSelectFields = [
                "ID",
                "NAME",
                "CODE",
                "ACTIVE",
                "ACTIVE_FROM",
                "PREVIEW_TEXT",
                "PREVIEW_PICTURE",
                "PROPERTY_DOC_FILE",
                "PROPERTY_DOC_FILE_VALUE",
            ]
        );

        $fileIds = [];

        while($row = $sqlResult->Fetch()) {
            $row["DOC_FILE"] = CFile::GetPath($row['PROPERTY_DOC_FILE_VALUE']);
        }
    }
?>