I am trying to make a web service call from PHP to a SOAP web service with a sample request which looks like this:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://ws.somedomain.com/">
   <soapenv:Header/>
   <soapenv:Body>
      <ws:SearchMarketplaceSku>
         <ws:Request>
             <ws:Security>
               <ws:PartnerKey>[suppressed]</ws:PartnerKey>
               <ws:Password>[suppressed]</ws:Password>
            </ws:Security>
            <ws:AvailableOnDate>2012-04-03T00:00:00</ws:AvailableOnDate>
            <ws:IncludeStateDetails>true</ws:IncludeStateDetails>
            <ws:State>CA</ws:State>
         </ws:Request>
      </ws:SearchMarketplaceSku>
   </soapenv:Body>
</soapenv:Envelope>

The PHP code being used is:

$soapClient = new SoapClient($wsdlUrl);   
$ap_param = array('PartnerKey'    =>    $PartnerKey, 'Password'    =>    $metapackPassword, 'AvailableOnDate' => '2012-04-03T00:00:00','IncludeStateDetails'=>true, 'State'=>'CA');
$info = $soapClient->__call("SearchMarketplaceSku", $ap_param);

The web service call results in an "Request was not specified properly; server unable to deserialize request" error? What is the problem? Does the $ap_param array need to include all the nested nodes coressponding with the XML? Is there an easier way to make this call using "WSDL" mode?

Thanks for your help

• php
• soap

PartnerKey and Password has to be in an Array under the key Security:

$ap_param = array(
'Security' => array(
    'PartnerKey'    =>    $PartnerKey,
    'Password'    =>    $metapackPassword
),
'AvailableOnDate' => '2012-04-03T00:00:00',
'IncludeStateDetails'=>true, 'State'=>'CA'
);