Italian Ricezione per nik name con Firebase(Notifiche)

dim niknamefirebase as string
If Nicknamefirebase = utenza_login_app then
invia_notifica
end if

...
Public Sub SubscribeToTopics
    Log("*******************" & " general_" & idpizzeria)
    fm.SubscribeToTopic("general_" & id ) 'Può essere un gruppo o un utente
End Sub
....

<?php
    $url = "https://fcm.googleapis.com/fcm/send";
    $token = "general_12";
    $serverKey = 'your server token of FCM project';
    $title = "Notification title";
    $body = "Hello I am from Your php server";
    $notification = array('title' =>$title , 'body' => $body, 'sound' => 'default', 'badge' => '1');
    $arrayToSend = array('to' => $token, 'notification' => $notification,'priority'=>'high');
    $json = json_encode($arrayToSend);
    $headers = array();
    $headers[] = 'Content-Type: application/json';
    $headers[] = 'Authorization: key='. $serverKey;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST,"POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
    curl_setopt($ch, CURLOPT_HTTPHEADER,$headers);
    //Send the request
    $response = curl_exec($ch);
    //Close request
    if ($response === FALSE) {
    die('FCM Send Error: ' . curl_error($ch));
    }
    curl_close($ch);
?>

{"multicast_id":6574463376353790383,"success":0,"failure":1,"canonical_ids":0,"results":[{"error":"InvalidRegistration"}]}

<?php
    $url = "https://fcm.googleapis.com/fcm/send";
    $token = "general";
    $serverKey = "AAAA9JyC3ek:APA91bH-dRj3dobtUBRsLsDkOJoNaT1iY9Fv-5iweF6uIDoHokCKPwAv8dWlX2TIDgxu0i_LNU-VoOjPMg-wllJiRU65kn5lIWjhyK0xTTpOPSct42M_ETn65-H-95qkwaNVxxxxxx";
    $title = "Notification title";
    $body = "Hello I am from Your php server";
    $notification = array('title' =>$title , 'body' => $body, 'sound' => 'default', 'badge' => '1');
    $arrayToSend = array('to' => $token, 'notification' => $notification,'priority'=>'high');
    $json = json_encode($arrayToSend);
    $headers = array();
    $headers[] = 'Content-Type: application/json';
    $headers[] = 'Authorization: key='. $serverKey;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST,"POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
    curl_setopt($ch, CURLOPT_HTTPHEADER,$headers);
    //Send the request
    $response = curl_exec($ch);
    //Close request
    if ($response === FALSE) {
    die('FCM Send Error: ' . curl_error($ch));
    }
    curl_close($ch);
?>
?>

<?php
        $url = "https://fcm.googleapis.com/fcm/send";
        $topico = "general";
        $api_key = "AAAA9Jyxxxxxxxxxx"; //key server personale
        $titulo = "Prima Notifica";
        $corpo = "Messaggio n 1";
        $legenda = "Notifica";
 

            $headers = array
            (
                'Authorization: key='.$api_key,
                'Content-Type: application/json;charset=UTF-8'
            );
 
            $data = array
            (
              'data' =>
              array (
                'title' => $titulo,
                'body' => $corpo,
                'subtitle' => $legenda,
              ),
              'to' => '/topics/'.$topico,
              'priority' => 'high',
              //'restricted_package_name' => 'com.onlyoneapp.test', //IF YOU WANT SEND TO ONLY ONE APP
            );
 

            $content = json_encode($data);
            $curl = curl_init($url);
            curl_setopt($curl, CURLOPT_HEADER, false);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $content);
            curl_setopt($curl,CURLOPT_SSL_VERIFYPEER, false );
            $result = curl_exec($curl);
            curl_close($curl);
            $arr = array();
            $arr = json_decode($result,true);
 
            if ($arr === FALSE) {
                echo "Json invalido!"."<br>";
            } else if (empty($arr)) {
                echo "Json invalido!"."<br>";
            }else{
                if (array_key_exists ('message_id', $arr)){
                    echo "Messaggio Inviato! <br>Mensagem id: ".$arr['message_id']."<br>";
                }else{
                    echo "Ocorreu um erro ao enviar a notificação!"."<br>";
                }
            }
?>

If File.Exists(File.DirDefaultExternal,"sessione.bin") Then
        sessione_map.Initialize
        sessione_map = File.ReadMap(File.DirDefaultExternal,"sessione.bin")

android:targetSdkVersion="14"

Sub disconetti_Click 
    StopService("FirebaseMessaging")
End Sub