How to send push notification to 2 devices without creating topic or group using just the FCM tokens in Firebase?

Question

I just need to send push notifications to a handful of devices. I have their device tokens in an array. Do I need to create topics or groups for this?

I can send push notifications individually using a for loop, but is there a better way to do this?

EDIT: Please do not mark this question as duplicate without understanding. The question

FCM (Firebase Cloud Messaging) Send to multiple devices

has answers to use FCM Token and groups, which I have clearly stated that is not my requirement. As far as 'registration_ids' mentioned by other question is concerned its not mentioned anywhere in the official docs , if it is mentioned then please point it out as a valid answer.

what is your need? you need to send the messages to your FCM tokens devices or your client mobile need to subscribe the topic. and you send the messages based on topics.? — Noorul, Dec 09 '16 at 05:54
follow this URL https://firebase.google.com/docs/cloud-messaging/http-server-ref — Noorul, Dec 09 '16 at 06:26
Check this box for further references : Downstream HTTP messages (JSON) registration_ids — Noorul, Dec 09 '16 at 06:27
check this URL Also https://firebase.google.com/docs/cloud-messaging/server#format — Noorul, Dec 09 '16 at 06:30
Hi I dont see any mention of registration_ids in the doc, it says the registration_ids is now replaced by the "to" field. — Utsav Gupta, Dec 09 '16 at 07:32

score 6 · Answer 1 · answered Dec 09 '16 at 05:56

6

Use "registration_ids" instead of "to".

var message = { 
    registration_ids:['id1','id2','id3'],
    notification: {
        title: 'Hello There...!', 
        body: 'this is test notification' 
    }
};

Hope It Works..!!!

answered Dec 09 '16 at 05:56

Nitin Bhanderi

334
2
9

Is there a documentation for this in firebase? – Utsav Gupta Dec 09 '16 at 06:09
@Utsav Gupta you can use it from server side. check it out – Nitin Bhanderi Dec 09 '16 at 06:18
it says "There is no support for multiple recipients." – Utsav Gupta Dec 09 '16 at 07:29

score 0 · Answer 2 · answered Jul 18 '17 at 09:57

I know this has been answered and not a very latest question.

Sure, you can construct the string array and send it like this as mentioned in the google documentation find here.

HTTP POST request

For example, to add a device with the registration ID 51 to appUser-Chris, you would send this request:

{
   "operation": "add",
   "notification_key_name": "appUser-Chris",
   "notification_key": "APA91bGHXQBB...9QgnYOEURwm0I3lmyqzk2TXQ",
   "registration_ids": ["51"] //you can insert something more of your strings here.
}

Response format

A successful request to either add or remove a device returns a notification_key like the following:

{
   "notification_key": "APA91bGHXQBB...9QgnYOEURwm0I3lmyqzk2TXQ"
}

score 0 · Answer 3 · answered Feb 13 '21 at 07:26

<?php
// Your code here!
class FCM
{
    private $key;

    function __construct($api_key)
    {
        $this->key = $api_key;
    }

    /**
     * Sending Push Notification
     */
    public function send_notification($registatoin_ids, $notification)
    {
        $fields = array ( 'to' => $registatoin_ids,'notification' => $notification); //'restricted_package_name' => "com.apps.firebasenotificationphp");
        
        $headers = array (
                'Authorization: key=' . $this->key,
                'Content-Type: application/json'
        );

       $ch = curl_init ();
       curl_setopt ( $ch, CURLOPT_URL, "https://fcm.googleapis.com/fcm/send" );
       curl_setopt ( $ch, CURLOPT_POST, true );
       curl_setopt ( $ch, CURLOPT_HTTPHEADER, $headers );
       curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
       curl_setopt ( $ch, CURLOPT_POSTFIELDS, json_encode($fields) );
       return curl_exec ( $ch );
       curl_close ( $ch );
    }
}

$api_key = "";
$device_id = "";
$fcm = new FCM($api_key);
$arrNotification = array ("body" => "hii","title" => "hello",'image' => "https://www.gstatic.com/devrel-devsite/prod/vb1c70bbe2f68b543db3deb1075af42e62f8f21e5fc703b8398dc6b9860f1711f/firebase/images/lockup.png",'link' => "",'sound' => "default");

echo $fcm->send_notification($device_id,$arrNotification);
?>

How to send push notification to 2 devices without creating topic or group using just the FCM tokens in Firebase?

3 Answers3