I experienced the same behaviour with php 5.0.1 running on linux/apache.

I am also having difficulty with deserialize.
If I take an array and run wddx_serialize_vars("thisarr"). Then take the result and deserialize it, any array keys that are numbers produce a "no such index" when dereferencing. I was able to work around the problem with the following:

function SanitizeArray ($arr) {
 if (!is_array($arr)) { return $arr; };
 while (list($key,$val) = each($arr) ){
  if (is_array($val)) { $val = SanitizeArray($val); };
  $rtn[$key] = $val;
 };
 return $rtn;
};

array keys that were strings did not have any problems.

More info on my previous note.

Sample code:
-------------------------------------------------------------
<?
function SanitizeArray ($arr) {
 if (!is_array($arr)) { return $arr; };
 while (list($key,$val) = each($arr) ){
  if (is_array($val)) { $val = SanitizeArray($val); };
  $rtn[$key] = $val;
 };
 return $rtn;
};

$test = array(
	0 =>array(
		'me' => "you"
	),
	'one' => array(
		'me' => "you"
	)
);
print "<PRE>";
var_dump($test);
print $test[0]['me'] . "\n";
print $test['0']['me'] . "\n";
print $test['one']['me'] . "\n";
$ddx = wddx_serialize_vars("test");
$after = wddx_deserialize($ddx);
var_dump($after['test']);
print $after['test'][0]['me'] . "\n";
print $after['test']['0']['me'] . "\n";
print $after['test']['one']['me'] . "\n";
list($key,$val) = each($after['test']);
print gettype($key);
$clean = SanitizeArray($after);
var_dump($clean['test']);
print $clean['test'][0]['me'] . "\n";
print $clean['test']['0']['me'] . "\n";
print $clean['test']['one']['me'] . "\n";
list($key,$val) = each($after['test']);
print gettype($key);
print "</PRE>";
phpinfo();
?>
-----------------------------------------------------------
Produces:
array(2) {
  [0]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
  ["one"]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
}
you
you
you
array(2) {
  ["0"]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
  ["one"]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
}


Notice:  Undefined offset:  0 in C:\Program Files\Apache Group\Apache2\htdocs\syncit\test.php on line 27




Notice:  Undefined index:  0 in C:\Program Files\Apache Group\Apache2\htdocs\syncit\test.php on line 28


you
stringarray(2) {
  [0]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
  ["one"]=>
  array(1) {
    ["me"]=>
    string(3) "you"
  }
}
you
you
you
string
-----------------------------------------------------------
PHP Version 5.0.0
Windows NT COUNTER-3 5.0 build 2195
Build Date: Jul 13 2004 21:34:42

There is a BUG. And a major one.
The most interesting aspect of this bug is that the deserialization works perfectly under Zend Development Environment (3.5.0) but does not work under my Apache 2.50 /PHP5.0.2. I'm using Win2003.

But the problem isn't in Apache (it seems), because the same bug occurs when I run my .php file with php.exe.

DO SOMETHING!!!

I am using 5.0.3-DEV (Stable Snapshot 200411161730).  Deserialization works fine for objects that are all public.  However as soon as the object has private or protected member variables, the result bombs.

Sample code: (Failure Only)
---------------------------
try
{
	throw new Exception ("FooBar", 1111);
}

catch (Exception $e)
{
	$s = wddx_serialize_value ($e);
}

$t = wddx_deserialize($s);

print_r ($t);

----------------
Expected Result:
----------------
Exception Object
(
    [message:protected] => FooBar
    [string:private] => 
    [code:protected] => 1111
    [file:protected] => /virtualhosts/test/wddx3.php
    [line:protected] => 4
    [trace:private] => Array
        (
        )
)

--------------
Actual Result:
--------------
Exception Object
(
    [message:protected] => 
    [string:private] => 
    [code:protected] => 0
    [file:protected] => /virtualhosts/test/wddx3.php
    [line:protected] => 16
    [trace:private] => Array
        (
        )

    [0] => FooBar
    [1] => 
    [2] => 1111
    [3] => /virtualhosts/test/wddx3.php
    [4] => 4
    [5] => Array
        (
        )
)

Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".