Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc. If the script requires a 
database to demonstrate the issue, please make sure it creates 
all necessary tables, stored procedures etc.

Please avoid embedding huge scripts into the report.

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".

i get the same problem.
i suspect it is caused by my server trying to return a (class containing an array containing some) NaN
found about the same bug-description in #43045, therefore updated php (both client and server side) to 5.2.6-dev as indicated
but alas, still the same problem

Wim

same problem on php 5.2.6.
It happened when some transmited ComplexType (eg. in PHP stdClass) have some member variable with mixing small and big letters (this was my case).

For example this causes an error:
class MyStdClass {
 var $cisloDokladu;
}
server code: 
$myStdClass = new MyStdClass();
$myStdClass->cisloDokladu = 'what you want';
return $myStdClass;

when changing on $cislodokladu, it is ok.

but some varibles doesn't cause this problem fo example:
 var $someElseVar;

Thanks for reopening this issue. Not critical for me, I have only changed variable name but it is a bug.

Or problem may sit here (copied and tried from another commercial server):

It took me hours to find out the cause of the problem, so I like to share it with you.

In the WSDL we defined some (optional) numeric attributes (xsd:integer). It turns out that the mock service response generation functionality creates responses that contain example values in these attributes.
The example value generated is "?", and that is not an integer value. Changing it to value "1" for example solves the problem.