<?php
$callback = $_GET['callback"];
if (isset($_GET['wait"])) {
sleep($_GET['wait"]); // in seconds
}
header('content-type: text/javascript");
header('Cache-Control: no-store;max-age:0");
header('Expires: Tue 10 Mar 1989 03:10:00 GMT");
echo $callback . '({"data":"here","callback":"".$callback.'"})";
?>