Here's the XML response:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
- <SOAP-ENV:Envelope xmlns:SOAPSDK1="http://www.w3.org/2001/XMLSchema" xmlns:SOAPSDK2="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAPSDK3="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
- <SOAP-ENV:Body SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
- <SOAPSDK4:GetWorkflowTaskTemplateGuidsResponse xmlns:SOAPSDK4="http://tempuri.org/crossAPI/message/">
  <Result href="#id1" />
  </SOAPSDK4:GetWorkflowTaskTemplateGuidsResponse>
- <SOAPSDK5:IResult xmlns:SOAPSDK5="http://tempuri.org/crossAPI/type/" id="id1" SOAPSDK3:root="0" SOAPSDK2:type="SOAPSDK5:IResult">
  <errorcode>0</errorcode>
  <errordesc SOAPSDK2:nil="true" />
- <data SOAPSDK3:arrayType="SOAPSDK1:string" SOAPSDK3:offset="" SOAPSDK2:type="SOAPSDK3:Array">
  <SOAPSDK3:string>bb578372-7c36-4c48-b9f8-7c6cce575b40</SOAPSDK3:string>
  <SOAPSDK3:string>5eace802-f133-4fc9-9c2d-770ce1380fd9</SOAPSDK3:string>
  <SOAPSDK3:string>8bd1724c-d393-41cb-8eb2-7d329837044e</SOAPSDK3:string>
  <SOAPSDK3:string>7d2df1b7-5f4b-4dba-af5f-bd2f900232fb</SOAPSDK3:string>
  <SOAPSDK3:string>f21b1ff7-c031-4851-85b9-d76a34c3b43d</SOAPSDK3:string>
  <SOAPSDK3:string>3125de17-8814-4c64-a74a-e1ca9e5c9d27</SOAPSDK3:string>
  <SOAPSDK3:string>6fea4432-52a1-4e65-b8d2-3035a79b3404</SOAPSDK3:string>
  </data>
  </SOAPSDK5:IResult>
  </SOAP-ENV:Body>
  </SOAP-ENV:Envelope>

As PHP array, it looks as follows:

Array (
=> bb578372-7c36-4c48-b9f8-7c6cce575b40
=> 5eace802-f133-4fc9-9c2d-770ce1380fd9
=> 8bd1724c-d393-41cb-8eb2-7d329837044e
=> 7d2df1b7-5f4b-4dba-af5f-bd2f900232fb
=> f21b1ff7-c031-4851-85b9-d76a34c3b43d
=> 3125de17-8814-4c64-a74a-e1ca9e5c9d27
=> 6fea4432-52a1-4e65-b8d2-3035a79b3404
=> 0
)

!SOAPSDK3:offset is an attribute. so if i am just interested in the values, i need to filter by all keys which are numeric first?