如何从php服务器端向像Android这样的Visual Basic客户端发送通知

Question

是否有可能从php服务器端向Visual Basic发送通知，或者我是否必须每隔X分钟将服务器端数据库与本地数据库同步以检查是否有任何更改？

<?php
require("connection.php");
include 'send_notification.php';
if (!$conn) 
    $response["response"] = false;
    $response["log"] = mysqli_error($conn);
    $response["exception"] = 1;
    echo json_encode($response);
 else 
    $pricing = json_decode($_POST['pricing'], true);
    $user = json_decode($_POST['user'], true);

    // Here update database....

    $company_token = getCompanyToken($user["id"]); // Find company token from MySql database to send FCM to android Client


    sendNotification($company_token); // Send Notification To Android...It works fine..

    // Same notification to Visual Basic Windows Client...
    // Help!! Synchronize local database with the server or is there any other way?


    
    mysqli_close($conn);
    
?>