Description:
------------
I think it's usefull to have a SoapClient::setHeader (or something like that) for soap servers that requires static headers (mostly with authentication parameters)

$soapHeader = new SoapHeader($ns, 'AuthHeader', array (
	'Username' => $user,
	'Password' => $pass
));

$soap = new SoapClient($wsdl, $options);

/* so you can do this: */
$soap->setHeader($soapHeader);
$soap->function1($parameters);
$soap->function2($parameters);
$soap->function3($parameters);

/*instead of this:*/
$soap = new SoapClient($wsdl, $options);
$soap->__soapCall('function1', $parameters, null, $soapHeader);
$soap->__soapCall('function2', $parameters, null, $soapHeader);
$soap->__soapCall('function3', $parameters, null, $soapHeader);