Description:
------------
I can't iterate over IE's $ie->document->createEventObject() with PHP whereas I can in IE.

Reproduce code:
---------------
<?php
// create a new internet explorer instance
$ie = new COM("InternetExplorer.Application");

// So the alerts can be seen
$ie->visible = true;

// ensure a document exists within ie
$ie->Navigate2 ("about:blank");
while ($ie->readyState!=4) usleep(100000);
// convenience
$doc = $ie->document;
$window = $doc->parentWindow;

// required - var must be declared
$window->execScript ("var evt='';");
// create an event object
$window->evt = $doc->createEventObject();

// proof the object is valid, iteratable
$window->execScript("
  var str=''; var idx;
  for (idx in evt)
    str+=idx+'; ';
  alert('Keys: '+str);");

// Bug: can't iterate the object in PHP
foreach ($window->evt as $prop => $val)
  print "<br>$prop ";

// ensure ie is still alive
$window->execScript("alert('Alive');");
$ie->quit();   // necessary since visible
?>

Expected result:
----------------
I expect PHP not to die at the foreach
I expect the same text to be output as with the alert

Actual result:
--------------
PHP falls over upon hitting the foreach loop with:

Fatal error: Uncaught exception 'Exception' with message 'Object of type variant  did not create an Iterator' in c:\phpBugs\foreach.php: 28
Stack trace:
#0 C:\phpBugs\foreach.php(28): unknown()
#1 {main} thrown in C:\phpBugs\foreach.php on line 28