This is the php code used for the fallback:

<?php
$image_file = $_GET['src'];
$text = $_GET['text'];
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title><?echo $text?></title>

<style type="text/css">
#wrapper {
text-align: center;
}
img {
border: 2px dashed maroon;
padding: 50px;
background-color: #dfdfdf;
}
h3 {
font-family: Verdana, Helvetica, sans-serif;
color: maroon;
}
</style>

</head>
<body>

<div id="wrapper">
<h3><?echo $text?></h3>
<p><img alt="<?echo $text?>" title="<?echo $text?>" src="<?echo $image_file?>" /></p>
</div>

</body>
</html>