通过SOAP为SAP Web服务传递数组

我正试图通过用于SAP Web服务的SOAP传递一个2D数组。但我无法通过同样的考试。

我可以传递一个值，也可以接受SAP的表输出。请引导。

我尝试将数组类型转换为对象。

我的代码：

<?php       
    include("include/config.php");
    $sql = "SELECT tid,OrderNumber FROM transhistory ORDER by timestamp ASC limit 2";
    $result= mysqli_query($db,$sql);
    $i=0;
    while($row = mysqli_fetch_array($result,MYSQLI_ASSOC)) {
        //Array based on output table
        $pmt[$i][0] = "";                       //Mandt
        $pmt[$i][1] = $row["tid"];              //Refnum
        $pmt[$i][2] = $row["OrderNumber"];  //Orderno
        $i++;
    }
    /*Two methods I tried */   
    $object = (object) $pmt;
    $object = json_decode(json_encode($pmt), FALSE);
    #Define Authentication 
    $SOAP_AUTH = array( 'login'    => 'abc',
                        'password' => 'abc');
    #Specify WSDL
    $WSDL = "working URL here";
    #Create Client Object, download and parse WSDL
    $client = new SoapClient($WSDL,$SOAP_AUTH);
    #Setup input parameters (SAP Likes to Capitalise the parameter names)
    $params = array(
          'Zpmt' => $object 
    );
    #Call Operation (Function). Catch and display any errors
    try {
        $result = $client->ZphpOT($params);
    } catch (SoapFault $exception) {
        echo 'Error!Server Connectivity issue. Please try again later.';
        die();
    }      
?>