PHP致命错误：未捕获的SoapFault异常：[客户端]函数（“getProxy”）不是

Question

我编写了一个用于从WSDL Web服务调用方法的PHP代码：

include_once dirname(__FILE__).'/nusoap_client.php';
$merchant = '123123123';
$amount = '10000'; 
$ResNum = $_POST['ResNum'];
$RefNum = $_POST['RefNum'];
$State = $_POST['State'];
$TRACENO = $_POST['TRACENO'];
if ($State=='OK') {
$soapclient = new SoapClient("referencepayment.asmx?WSDL");
$soapProxy = $soapclient->getProxy();
$res = $soapclient->VerifyTransaction($RefNum, $MID);

if ($res <= 0)
echo 'verification failed';
else if ( $res == $amount ) {
echo 'it verified';
echo 'code rahgiri'.$TRACENO;
echo 'resid digital'.$RefNum;
echo 'number kharid'.$RefNum;
}
else {
echo 'error1';
}
}
else {
echo 'error2';
}

调用getProxy()方法

后出现此错误

PHP Fatal error:  Uncaught SoapFault exception: [Client] Function ("getProxy") is not a valid method for this service in callback.php:27
    Stack trace:
    #0 callback.php(27): SoapClient->__call('getProxy', Array)
    #1 callback.php(27): SoapClient->getProxy()
    #2 {main}
      thrown in callback.php on line 27

我们需要解决这个问题。

如何？

谢谢