PHP SoapClient无法处理重定向到https

I'm implementing a SOAP client with PHP SoapClient.

The wsdl-file specifies URL for a function of type http (like http://api.example.com/a/b).

However, when called, I get a response

HTTP/1.0 301 Moved Permanently
Location: https://api...

Apparently the SoapClient can not handle the redirect.

How can I solve the issue?

$param = array('user' => 'Gopal',
    'password' => 'Rathod',
    'KeyCode' => 'XYXXYGOPALASDADXXX',
    'ExternalID' => 'PUBLICSTORAGE',
    'sXml' => $strinXML, 'trace' => TRUE);

$soapClient = new SoapClient('https://wsdlfullUrl.asmx?WSDL', array('trace' => TRUE));
$result = $soapClient->__soapCall('Request', array($param));

echo '<br> 3. Call Request:<br>' .  $soapClient->__getLastRequest() ;
echo '<br> 4. RESPONSE:<br>' . $soapClient->__getLastResponse();


More link  http://php.net/manual/en/book.soap.php