Laravel调用API时POST对象数组出错，请求排查修正

你的代码存在三个关键错误，导致请求格式与API要求不匹配：

• 时间格式错误：shipmentDate字段误用=>代替了时间格式所需的:，这会造成时间格式完全不符合API预期。
• waybills结构错误：API要求waybills是对象数组，但你直接传递了单个关联数组，需要用[]将其包裹为数组结构。
• declared结构错误：API中declared同样要求是对象数组，当前代码传递的是单个关联数组，也需要用[]包裹。

修正后的完整代码：

$insert = Http::withHeaders([
    'POSTE_clientID' => '4815fd18-xxxx-xxxx-xxxx-d1a1edbd7a12',
    'Authorization' => $auth,
])
->post('https://apiw.gp.posteitaliane.it/gp/internet/postalandlogistics/parcel/waybill', [
    "costCenterCode" => "CDC-00051975",
    "paperless" => "false",
    "shipmentDate" => "2024-06-29T08:02:20.986+0000",
    "waybills" => [
        [
            "clientReferenceId" => "1404343485",
            "printFormat" => "A4",
            "product" => "APT000901",
            "data" => [
                "declared" => [
                    [
                        "weight" => "0",
                        "height" => "44",
                        "length" => "30",
                        "width" => "25"
                    ]
                ]
            ]
        ]
    ]
])
->json();

内容的提问来源于stack exchange，提问作者giuseppe pesce