How to structure a key value pair for soap request

Question

I need help (being new to SOAP in general) to create the following output in my request XML:

<values> 
<table> 
<key xsi:type="xsd:string">SOME_KEY</key> 
<value xsi:type="xsd:string">SOME_VALUE</value> 
</table> 
</values>

I just need to know how to structure this in PHP and the pass it to soapclient as a parameter for a method.

Answer 1

        <pre1:results>
           <!--Zero or more repetitions:-->
           <sys:KeyValuePairOfstringstring>
              <sys:key>str1</sys:key>
              <sys:value>str2</sys:value>
           </sys:KeyValuePairOfstringstring>
        </pre1:results>

In this case "results" is the IEnumerable< string, string > parameter name