我是soapClient，访问web服务如下。
$con = new SoapClient('wsdl url');
$array = array("apiRequestDetails" => array(
"id" => "0000045399",
"mobile" => "9843484142",
"pin" => "b59c67bf196a4758191e42f76670ceba",
"refNumber" => "222",
"serviceCode" => "23",
"trxnTraceId" => "1",
"value" => "200.068879335"
));
$det = $con->__call('initiatePayment', $array);
echo '<pre>';
print_r($det);
我收到以下错误致命错误：未捕获的SoapFault异常：[S:Server]java.lang.NullPointerException in D:''examplep''htdocs''sharepoint''connection.php:25堆栈跟踪：
0 D:''examplep''htdocs''sharepoint''connection.php（25）：SoapClient->__call（'initiatePayment'，Array）
1｛main｝
在第25行的D:''examplep''htdocs''sharepoint''connection.php中抛出有人能告诉我这个错误是什么吗？我该怎么解决它。提前感谢
这是一个未处理的异常。尝试将其包装在Try/catch块中以找出错误。此外，__call()已弃用，您应该使用__soapCall()。
try{
$det = $con->__soapCall('initiatePayment', $array);
print_r($det);
} catch(SoapFault $ex){
echo $ex->getMessage();
}