<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><SOAP-ENV:Body><SOAP-ENV:request_a_paymentResponse><return xsi:type="xsd:string">Object</return></SOAP-ENV:request_a_paymentResponse></SOAP-ENV:Body></SOAP-ENV:Envelope>


var dump of response:
array (size=7)
  'MESSAGE_TYPE' => null
  'MESSAGE' => null
  'MESSAGE_DESCRIPTION' => null
  'TRANSACTION_ID' => null
  'ACTION_TYPE' => null
  'REFERENCE_NUM' => null
  'STATUS' => null