如何使用PHP SOAP扩展获得SSL连接？

$sslOptions = array(
    'ssl' => array(
        'cafile' => "c:/inetpub/wwwroot/eServices/Server_DSA_Public_Certificate.pem",
        'allow_self_signed' => true,
        'verify_peer' => false,
     ),
);      
$sslContext = stream_context_create($sslOptions);

$clientArguments = array(
    'stream_context' => $sslContext,
    'trace' => true,
    'exceptions' => true,           
    'encoding' => 'UTF-8',
    'soap_version' => SOAP_1_1,
);

$oClient = new WSSoapClient("c:/inetpub/wwwroot/eServices/svc.wsdl", $clientArguments);  
// WSSoapClient extends SoapClient to add a WS-Security UsernameToken header    

$oClient->__setUsernameToken("myusername", "mypassword");   
return $oClient->__soapCall($operation, $request);