<?php
$id_time = fopen("id_time.txt", "r") or die("Unable to open file");
$lasttime = fread($id_time, filesize("id_time.txt"));
fclose($id_time);
if ((time() - $lasttime) > 55)
  include('id_fetch.php');
else {
  $id_tags = fopen("id_tags.txt", "r") or die("Unable to open file");
  echo fread($id_tags, filesize("id_tags.txt"));
  fclose($id_tags);
}
?>