get remote list blank

get_remote_designs_list.php

+<?php
+/*
+FILE NAME  : get_designs_list.php
+DESCRIPTION: optical design
+REVISION: 1.00
+AUTHOR: Oleg Dzhimiev <oleg@elphel.com>
+LICENSE: AGPL, see http://www.gnu.org/licenses/agpl.txt
+Copyright (C) 2014 Elphel, Inc.
+*/
+
+//$res_xml = file_get_contents("sensors/sensors.xml");
+
+$path = "local";
+
+$res_xml  = "<?xml version='1.0'?>\n";
+$res_xml .= "<Document>\n";
+
+$files = scandir($path);
+
+foreach($files as $file){
+  if (is_file("$path/$file")) {
+    $res_xml .= "\t<file>$file</file>\n";
+  }
+}
+
+$res_xml .= "</Document>";
+
+header("Content-Type: text/xml");
+header("Content-Length: ".strlen($res_xml)."\n");
+header("Pragma: no-cache\n");
+printf("%s", $res_xml);
+flush();
+
+?>