php soap server return plain response - php

Question

Actually I create a Soap Proxy in which I get the client request and I need to post the request further to another SOAP server (with c_url).
The response is successfully obtained (as xml with <SOAP-ENV and all others).
The problem is that in my SOAP PROXY I want to return exactly the response and if my server is returning the xml the SOAP Server actually return the XML file wrap up
<SOAP-ENV:Envelope ...>
<SOAP-ENV:Body>
<ns1:loginResponse>
my xml that already contains <soap:Envelope, <soap:Body> and <namesp1:loginResponse>
</ns1:loginResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
The question is: How can I make the soap server to return exactly the response that i want without wrapping up with soap envelope and others?
Thanks.
UPDATED:
My soap server:
$server = new SoapServer($myOwnWsdlPath);
$this->load->library('SoapProxy');
$server->setClass('SoapProxy', $params );
$server->handle();
My soap Porxy with c_url:
public function __call($actionName, $inputArgs)
{
//some logic
$target = ...
$url = ..
$soapBody =..
$headers = ..
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_TIMEOUT, 100);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $soapBody); // the SOAP request
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch); //soap xml response
curl_close($ch);
file_put_contents('/tmp/SoapCurl.txt', var_export($response, true));
return $response;
}
The response from /tmp/SoapCurl.txt is the correct one:
<?xml version="1.0" encoding="UTF-8"?>
<soap:Envelope ...>
<soap:Body>
<namesp1:loginResponse>
<session_id xsi:type="xsd:string">data</session_id>
</namesp1:loginResponse>
</soap:Body>
</soap:Envelope>
My soap server response is wrong:
<SOAP-ENV:Envelope ...>
<SOAP-ENV:Body>
<ns1:loginResponse>
<soap:Envelope ...>
<soap:Body>
<namesp1:loginResponse>
<session_id xsi:type="xsd:string">correct data</session_id>
</namesp1:loginResponse>
</soap:Body>
</soap:Envelope>
</ns1:loginResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Answer 1

The fix I found was to extend the 'handle' function of SoapServer
Discard the output of SoapServer (with ob_end_clean) and replace it with my data
class MySoapServer extends SoapServer
{
public function handle($soap_request = null)
{
parent::handle();
ob_end_clean();
ob_start();
echo $_SESSION['data'];
}
}