<?
define("NOT_CHECK_PERMISSIONS", true);
if (!$_SERVER["DOCUMENT_ROOT"]) {
    $_SERVER["DOCUMENT_ROOT"] = realpath(__DIR__);
} else {
//    die ('Script for console only');
}

require($_SERVER["DOCUMENT_ROOT"] . "/bitrix/modules/main/include/prolog_before.php");

$fileName = $_SERVER['DOCUMENT_ROOT'] . '/upload/uf/ad7/ad7ed0e1e37b3eb04cf0fc7b7f0cda77.docx';

header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . basename($fileName));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($fileName));

//echo file_get_contents($fileName);