<?php
   $id = $argv[1];
   $st = (int)$argv[2];
   $dt = (int)$argv[3];
   $dom = new DomDocument("1.0");
   $dom->load(getenv('USER_DATA_PATH').'base.xml');
   $vi = $dom->getElementById($id); 
   $files = $vi->getElementsByTagName("file");
   if ($files->length > 0)  
       foreach ($files as $file) {    
           if ($file->getAttribute("stop") < $st) {              
           continue;
           }
           if ($file->getAttribute("start") >= $st + $dt){ 
	    break;
	   }
//error_log($file->getAttribute("name"),3,'mylog');  
           echo $file->getAttribute("name").",";
        }
   exit();
?>