We are developing using PHP and nusoap.  The wsdl file we are reading
has a line such as <xs:extension base="ac:Request">

So here is the answer we need:
- Generate a request (using nusoap preferrably) that includes the
elements of Request.

We need a request that looks like this:
---- BEGIN GOOD EXAMPLE ---
<feeLookupRequest xmlns="http://www.moneygram.com/AgentConnect40">
            <unitProfileID>11111</unitProfileID>
            <agentID>1234567</agentID>
            <agentSequence>1</agentSequence>
            <token>123TOKEN456</token>
            <timeStamp>2006-01-30T22:29:20Z</timeStamp>
            <apiVersion>1</apiVersion>
            <clientSoftwareVersion>1</clientSoftwareVersion>
            <productType>SEND</productType>
            <receiveAmount>555</receiveAmount>
            <receiveCountry>USA</receiveCountry>
            <deliveryOption>OTHER</deliveryOption>
        </feeLookupRequest>
---- END   GOOD EXAMPLE ---

NOT LIKE THIS:

---- BEGIN   BAD EXAMPLE ---
<feeLookupRequest xmlns="http://www.moneygram.com/AgentConnect40">
            <productType>SEND</productType>
            <receiveAmount>555</receiveAmount>
            <receiveCountry>USA</receiveCountry>
            <deliveryOption>OTHER</deliveryOption>
        </feeLookupRequest>
---- END   BAD EXAMPLE ---




And
$client = new
soapclient('https://tws.moneygram.com/extws/AgentConnect40.NET.wsdl' , 'wsdl');

-- BEGIN CODE --
 <?php
require_once('lib/nusoap.php');
$client = new
soapclient('https://tws.moneygram.com/extws/AgentConnect40.NET.wsdl' ,
'wsdl'); $err = $client->getError(); if ($err) { echo '<h2>Constructor
error</h2><pre>' . $err . '</pre>'; }

$the_gm_date = gmdate("Y-m-d\TH:i:s\Z"); $request = array(
    'unitProfileID'         => 11111
  , 'agentID'               => 1234567
  , 'agentSequence'         => 1
  , 'token'                 => '123TOKEN123'
  , 'timeStamp'             => $the_gm_date
  , 'apiVersion'            => 1
  , 'clientSoftwareVersion' => 1
);
$param = array(
    'productType'           => 'SEND'
  , 'receiveAmount'         => '999'
  , 'receiveCountry'        => 'USA'
  , 'deliveryOption'        => 'OTHER'
);

## FILL IN THE_BLANK (not using a scalar (string) see below) $result =
$client->call('feeLookup', THE_BLANK);

echo '<h2>Request</h2>';
echo '<pre>' . htmlspecialchars($client->request, ENT_QUOTES) . '</pre>';

/* This hack does work, but is not 'proper'
 * $string = '';
 * $string .= '<feeLookupRequest
xmlns="http://www.moneygram.com/AgentConnect40">';
 * foreach ($param as $key => $value) { $string .= "<$key>$value</$key>\n"; }
 * $string .= '</feeLookupRequest>';
 * $result = $client->call('feeLookup',$string);
 */


-- END CODE --

In soap.php:
* @author   Dietrich Ayala <dietrich@ganx4.com>
* @version  $Id: nusoap.php,v 1.94 2005/08/04 01:27:42 snichol Exp $

About line 1689 the following check needs to be there:
     if (isset($etype['extensionBase'])) {
       $this->elements[$type]['extensionBase'] = $etype['extensionBase'];
     }

Otherwise the extension base=XXX will not be seen.

I mean nusoap.php