Description:
------------
Trying to test this new feature documented here:
http://php.net/manual/en/session.upload-progress.php

Can't seem to get it working.

Test script:
---------------
// form.php
<?php
session_start();
?>
<form action="upload.php" method="POST" enctype="multipart/form-data">
<input type="hidden" name="<?php echo ini_get("session.upload_progress.name"); ?>" value="123" />
<input type="file" name="file1" />
<input type="file" name="file2" />
<input type="submit" />
</form>

// upload.php
<?php
session_start();
var_dump($_SESSION);
?>

Expected result:
----------------
I expect the following session values to be populated:

<?php
$_SESSION["upload_progress_123"] = array(
 "start_time" => 1234567890,   // The request time
 "content_length" => 57343257, // POST content length
 "bytes_processed" => 453489,  // Amount of bytes received and processed
 "done" => false,              // true when the POST handler has finished, 
successfully or not
 "files" => array(
  0 => array(
   "field_name" => "file1",       // Name of the <input/> field
   // The following 3 elements equals those in $_FILES
   "name" => "foo.avi",
   "tmp_name" => "/tmp/phpxxxxxx",
   "error" => 0,
   "done" => true,                // True when the POST handler has finished 
handling this file
   "start_time" => 1234567890,    // When this file has started to be processed
   "bytes_processed" => 57343250, // Amount of bytes received and processed for 
this file
  ),
  // An other file, not finished uploading, in the same request
  1 => array(
   "field_name" => "file2",
   "name" => "bar.avi",
   "tmp_name" => NULL,
   "error" => 0,
   "done" => false,
   "start_time" => 1234567899,
   "bytes_processed" => 54554,
  ),
 )
);
?>

Actual result:
--------------
I get this:

array(0) {}