Firebase how to send Topic Notification

Question

I am using below script to send notification to particular users:

<?php
// API access key from Google API's Console
define( 'API_ACCESS_KEY', 'My_API_KEY' );
$registrationIds = array( TOKENS );
// prep the bundle
$msg = array
(
    'body'  => "abc",
    'title'     => "Hello from Api",
    'vibrate'   => 1,
    'sound'     => 1,
);

$fields = array
(
    'registration_ids'  => $registrationIds,
    'notification'          => $msg
);

$headers = array
(
    'Authorization: key=' . API_ACCESS_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_SSL_VERIFYPEER, false );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );
$result = curl_exec($ch );
curl_close( $ch );
echo $result;
?>

Script is working fine but how can i send notification to all user who installed my app. I created a topic in my app (alerts), and i can send notification to all users via firebase console. Can anyone guide me to update above script for topic.

Can you provide the code of Push notification part in the IDE? ![I have coded the php script part](https://i.stack.imgur.com/LpuFJ.png) I dont know how to send request to the Firebase server. Please share the codes in the IDE that handle the push notification ![.](https://i.stack.imgur.com/cE21r.png) — Aacs, Jun 29 '17 at 11:26

score 30 · Answer 1 · answered Feb 22 '17 at 06:36

30

I fixed by replacing

$fields = array
(
    'registration_ids'  => $registrationIds,
    'notification'          => $msg
);

To

$fields = array
(
    'to'  => '/topics/alerts',
    'notification'          => $msg
);

answered Feb 22 '17 at 06:36

DIGITAL JEDI

1,672
3
24
52

What if I need to send to a specific subscriber? – Hamzeh Soboh Apr 27 '18 at 17:34
what is registration_ids? or how to find it, i want so send a message to eveybody, thanks! – Alberto Acuña Jul 10 '18 at 21:55
register id are the token values which is unique to each user – DIGITAL JEDI Jul 11 '18 at 09:57
@DIGITALJEDI so what if i wanna send a notification to all users, and not to each by each, im not sure if im understandig it – Alberto Acuña Jul 11 '18 at 21:25
then u just need to subscribe them to a topic like 'to' => '/topics/alerts' . Then all users which are subscribers by default will get noticfication – DIGITAL JEDI Jul 16 '18 at 08:59
@DIGITALJEDI where to predefine these topics – Vyshak Puthusseri Nov 20 '19 at 13:50
@VyshakPuthusseri in your Firebase Account – DIGITAL JEDI Nov 21 '19 at 05:13

score 10 · Answer 2 · answered Sep 08 '18 at 08:13

You can send the notifications without curl (which was not available on my server). I prepared a function which can send a notification to a specified topic:

sendNotification("New post!", "How to send a simple FCM notification in php", ["new_post_id" => "605"], "new_post", "YOUR_SERVER_KEY");

function sendNotification($title = "", $body = "", $customData = [], $topic = "", $serverKey = ""){
    if($serverKey != ""){
        ini_set("allow_url_fopen", "On");
        $data = 
        [
            "to" => '/topics/'.$topic,
            "notification" => [
                "body" => $body,
                "title" => $title,
            ],
            "data" => $customData
        ];

        $options = array(
            'http' => array(
                'method'  => 'POST',
                'content' => json_encode( $data ),
                'header'=>  "Content-Type: application/json\r\n" .
                            "Accept: application/json\r\n" . 
                            "Authorization:key=".$serverKey
            )
        );

        $context  = stream_context_create( $options );
        $result = file_get_contents( "https://fcm.googleapis.com/fcm/send", false, $context );
        return json_decode( $result );
    }
    return false;
}

How to create the topics and how do I know which users are under these topics — Vyshak Puthusseri, Nov 20 '19 at 13:49
the topic is created by the user who is using the app. Try to write a code where you can create a topic forcedly by the user... — Agniswar Chakraborty, May 27 '22 at 19:34

score 3 · Answer 3 · answered Apr 24 '18 at 19:33

i am work with google firebase many time and i suggest my simple code for send notification on topic.

public function test()
{
    // Method - 1
    // $fcmUrl = 'https://fcm.googleapis.com/v1/projects/myproject-b5ae1/messages:send HTTP/1.1';
    // $notification = [
    //     "message" => [
    //         "topic" => "foo-bar",
    //         "notification" => [
    //             "body" : "This is a Firebase Cloud Messaging Topic Message!",
    //             "title" : "FCM Message",
    //         ]
    //     ]
    // ]; 

    // Method - 2 

    $fcmUrl = 'https://fcm.googleapis.com/fcm/send';



    $notification = [
        "to" => '/topics/cbtf',
            "data" => [
                "message" : "Messaging Topic Message!",
            ]
        ]
    ];


    $headers = [
        'Authorization: key=AIza...............klQ5SSgJc',
        'Content-Type: application/json'
    ];


    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$fcmUrl);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($notification));
    $result = curl_exec($ch);
    curl_close($ch);

    return true;
}

score 2 · Answer 4 · answered May 06 '20 at 09:19

You can send notification to any of a topic in firebase. And you can do it from any language it's just a http request but Always you have to maintain the JSON format so that you can catch notification from your android part from

 public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);

    Timber.d("Data Payload: " + remoteMessage.getData());
}

So You need to send below JSON format

{
 "to": "\/topics\/general",
 "data": {
 "data": {
  "title": "Database Notification",
  "message": "New Data Added"
   }
 }
}

So that you can get this data set from remoteMessage.getData()

Sahil Omer · Answer 5 · 2021-09-09T18:59:41.053

With particular Topic

<?php

print "testing";

function sendPushnotification($data = array()) {

  $apiKey = '';


  $fields = array('to' => '/topics/EWAP' , 'notification' => $data);
  $headers = array('Authorization: key=' .$apiKey, 'Content-Type: application/json', 'priority' => 10);

  $url = 'https://fcm.googleapis.com/fcm/send';

  // var_dump($fields);

  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
  $result = curl_exec($ch);
  curl_close($ch);

  return json_encode($result, true);
}


$data = array(
  'title' => 'Today topic',
  'body' => 'done buddy'
);

var_dump(sendPushnotification($data));


?>

score 0 · Answer 6 · answered Sep 09 '21 at 18:51

With device token.

<?php

print "testing";

function sendPushnotification($to = '',$data = array()) {

  $apiKey = '';


  $fields = array('to' => $to , 'notification' => $data);
  $headers = array('Authorization: key=' .$apiKey, 'Content-Type: application/json');

  $url = 'https://fcm.googleapis.com/fcm/send';

  // var_dump($fields);

  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
  $result = curl_exec($ch);
  curl_close($ch);

  return json_encode($result, true);
}


$to = "add device here token ";
$data = array(
  'title' => 'Today topic',
  'body' => 'done buddy'
);

var_dump(sendPushnotification($to, $data));


?>

Firebase how to send Topic Notification

6 Answers6