PHP：WSDL请求 - 缺少必需参数'document'

Question

我正在尝试连接到WSDL并调用“Query_ByExample”。请参阅下面的示例。

我尝试过多个选项，但遗憾的是我无法创建请求。

$username="xxxxxx";
$password="xxxxxx";


$soapURL = "";

$client = new SoapClient($soapURL, array("trace" => 1, "exceptions" => 0, "login" => $username, "password" => $password) );



$params = array(
        'TypeElpProcess' => array(            
            'user' => 'xxxxxxx',
            'name' => 'QUERY_BY_EXAMPLE'
            ),            
        'TypeOrderDetails' => array(
            'RMANo' => '123123'
        )

);


var_dump($client->__getFunctions());

$response = $client->BookingElpEntry($params);


echo "<pre>";
    print_r($response);
echo "</pre>";

错误消息是：

   An Exception was thrown in the server:java.lang.Exception: missing required parameter 'document'
        [faultcode] => soapenv:Server

要完成成功的请求，我需要做什么？任何帮助，将不胜感激。谢谢大家。