{“line_items”：“必需参数缺失或无效”}

I am using Shopiy API for fulfill the order in PHP platform. When I try to fulfill the order, I can able to complete and getting a success response fron Shopify. If I pass line_items params then I am getting

{"line_items":"Required parameter missing or invalid"}

Can any one help me to figure out the issue.

<?php
require_once("inc/functions.php");
$shop = "my-store";
$fulfilment = array("fulfillment" => array ("tracking_number" =>"123456789",
                                            "tracking_company" => "FedEx",
                                            "line_items"=>array(array("id"=>2143139779))));
$response = shopify_call('accesstoken', $shop, "/admin/orders/1123553027/fulfillments.json", $fulfilment, 'POST');  
print_r($response);
?>

You need a quantity for each line item.

e.g.

"line_items" => array(
    array("id" => 12345, "quantity" => 1),