当我在sopaUI中使用XML时，结果很好，但是当我使用以下php代码时，结果显示为空白，我得到此错误：Fatal error: Uncaught SoapFault exception: [soap:Server] System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.NullReferenceException: Object reference not set to an instance of an object. at Saia.Presentation。我认为问题出在 Soap 标头或其他方面，因为当我注释掉参数时，结果没有变化。
我从哪里获得 wsdl 文件和架构的链接：http://www.saiasecure.com/webservice/pickup/n_Create.asp
$client = new SoapClient("http://www.saiasecure.com/webservice/pickup/soap.asmx?wsdl",array( 'trace' => 1,
'exceptions' => true,'features' => SOAP_SINGLE_ELEMENT_ARRAYS, ));
$params = array("UserID" => '*******',
"Password" => '*****',
"TestMode" => "Y",
"AccountNumber" => '******',
"CompanyName" => 'TESTING NAME',
"Street" => 'TESTING STREET',
"Box" => 'TESTING BOX',
"City" => 'LOS ANGELES',
"State" => 'CA',
"Zipcode" => '90001',
"ContactName" => 'TESTING CONTACT',
"ContactPhone" => '1234567890',
"PickupDate" => '2013-09-24',
"ReadyTime" => '13:00:00',
"CloseTime" => '17:00:00',
"SpecialInstructions" => 'Nothing',
"Details" => array("DetailItem" => array("DestinationZipcode" => '70364', "Pieces" => '5', "Package" => 'SK',"Weight" => '100', "Freezable" => 'N') ));
//print('<pre>');print_r($params);
$return = $client->Create($params);
如果您查看 WSDL，您会发现 Create 操作参数必须包含一个指向实际Create对象参数的request元素（您可以像发送关联数组一样发送该参数）。
我必须说 WSDL 不是很正确，因为相同的元素名称，这意味着 Create 用于不同的定义两次。一次如element，一次如complexType。
为了清楚起见，您必须使用实际代码：$return = $client->Create(array('request'=>$params));，它应该可以工作。