Description:
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I am seeing some weirdness after setting the SoapClient in the session and then retrieveing it in another page.

On the second page, I can retrieve the SoapClient from the session, but as soon as I access a method on the SoapClient, I get this error.

"Warning: SoapClient::__call(): supplied argument is not a valid sdl resource in welcome.php on line 18
There was a problem with your login: Error finding "uri" property"

I notice during debugging that the attributes sdl (originally :6) and httpurl (originally :8) become 0's after the redirect.  Everything else (location, __default_headers0 look the same. 

Reproduce code:
---------------
First php page:

session_start()
$soapclient = new SoapClient('some?WSDL');
$result = $soapclient->someOperation();
$_SESSION['client'] = $soapclient ; 


Second php page:
session_start()
$client= $_SESSION['client'];
try {
  $result = $soapclient->someOperation();
  echo $result;
} catch (exception $e) {
  echo $e;
}

Expected result:
----------------
Result

Actual result:
--------------
"Warning: SoapClient::__call(): supplied argument is not a valid sdl resource in welcome.php on line 18
There was a problem with your login: Error finding "uri" property"