<?php
//
function staggerDelay() {
  $tod = gettimeofday();
  if ($tod['usec'] % 2 == 1) usleep(mt_rand(50000, 250000)); // delay return in microseconds
}
//
$img = $_SERVER['DOCUMENT_ROOT'] . '/' . $_SERVER['QUERY_STRING'];
if ($info = @getimagesize($img)) {
  $image = file_get_contents($img);
  header('Content-type: ' . $info['mime']);
  header('Content-Length: ' . strlen($image));
  //staggerDelay();
  echo $image;
}
?>