On your upload.processor.php page, the file name of the uploaded file can be retrieved with:
Code:
basename($uploadFilename);
You could add this to your redirect...
Code:
header('Location: ' . $uploadSuccess.'?img='.basename($uploadFilename));
...and then translate it to a full URL on the success page:
Code:
<?php

// filename: upload.success.php

// make a note of the current working directory, relative to root.
$directory_self = str_replace(basename($_SERVER['PHP_SELF']), '', $_SERVER['PHP_SELF']);

// make a note of the directory that will recieve the uploaded files
$uploadsDirectory = 'http://'.$_SERVER['HTTP_HOST'] . $directory_self . 'uploaded_files/';

?><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html lang="en">
	<head>
		<meta http-equiv="content-type" content="text/html; charset=iso-8859-1">
		
		<link rel="stylesheet" type="text/css" href="stylesheet.css">
		
		<title>Successful upload</title>
	
	</head>
	
	<body>
	
		<div id="Upload">
			<h1>File upload</h1>
			<p>Congratulations! Your file upload was successful</p>
			<p><?php echo $uploadsDirectory.$_GET['img'];?></p>
		</div>
	
	</body>

</html>