I'm new to this SOAP thing, 'been doing some googling
but haven't found what I'm looking for.

There is a soap request in this format:

Code:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://url.com/" xmlns:web="http://schemas.url2.org">
  <soapenv:Header/> 
  <soapenv:Body> 
  <ser:GetTransactionData> 
  <ser:transactionQueryRequest> 
  <web:Hash>xyz123</web:Hash>
   <web:ProductId>1122</web:ProductId>
    <web:TransactionReference>889900</web:TransactionReference> 
    </ser:transactionQueryRequest> 
    </ser:GetTransactionData> 
    </soapenv:Body> 
    </soapenv:Envelope>
The respose will be in this format:

Code:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
 <s:Body> 
<GetTransactionAcquirerDataResponse xmlns="http://url.com/"> 
<GetTransactionAcquirerDataResult xmlns:a="http://schemas.url2.org" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"> <a:ResponseCode>01</a:ResponseCode> 
<a:ResponseDescription>OK</a:ResponseDescription> 
<a:Amount>1000000</a:Amount> 
<a:CardNumber>0</a:CardNumber> 
<a:MerchantReference>889900</a:MerchantReference> 
<a:PaymentReference>MER|REF|007</a:PaymentReference>
 <a:RetrievalReferenceNumber>34343883498349834</a:RetrievalReferenceNumber> 
</GetTransactionAcquirerDataResult> 
</GetTransactionAcquirerDataResponse> 
</s:Body> 
</s:Envelope>
How do I make the SOAP request within a PHP script and how do I
process the response and extract the needed values out; ResponseCode, Amount, CardNumber etc.

Many Thanks.