Response Error Timestamps

NewsController.php

<?php

namespace App\Http\Controllers;

use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;

class NewsSampleController extends Controller
{
    public function index()
    {

        $now = Carbon::now()->timestamp;
        $milliseconds = now()->getPreciseTimestamp(3);

        $appID = 'eoC32W37zaWOnAg3S3hmrTy3VX3pZG2g';
        $appKey = '33h78jqcZR17JbnCoPZD9HoiVPxDNF6T1TZprAoPFeFRbWPTq2otqEaTfhfFj2st';
        $sessionKey = 's878KLmofNBCdshFZcKwVptWBvjQQEaS5dFI5hlRyeJnIyfPQ2oEc0GiLAFs2H1V';
        $sign = 'appId='.$appID.'&appKey='.$appKey.'&sessionKey='.$sessionKey.'&timestamp='.$now;
        $cryp = sha1($sign);

        $response = Http::acceptJson()->post('http://api.xinhua-news.com/newapi/getnewsbyproduct', [
            'appId' => $appID,
            'appKey' => $appKey,
            'sessionKey' => $sessionKey,
            'timestamp' => $now,
            'sign' => $cryp,
            'productCategoryId' => ['c0030002'],
            'pageSize' => 10
            // 'newsCategoryId' => ['c0270001','c0270864']
        ]);

        if ($response->serverError()) {
           dd('Error');
        } else if ($response->failed()) {
            dd('Failed');
        } else if ($response->clientError()) {
            dd('Client Error');
        } else if($response->successful()) {

            dd($response->json());
          
//           Response Like This
            
            //array:2 [▼
                //   "ErroCode" => "106"
                //   "status" => "erro"
                // ]
          
        }


    }
}

Please try to replace $now with $milliseconds in $sign

when i change with microtime the error change to 107

this error is not about timestamp. Would you show me the parameters when you use the interface “getnewsbyproduct”？And you'd better use the interface "getordercid" first to get the ordered product id. Use this id to get articles by the interface “getnewsbyproduct”.

ok i will try again. i just folllow your instruction in documentation in word file