How to subscribe to topics with web browser using Firebase Cloud Messaging

Question

I\'m trying to find a way to send a notification using Firebase Cloud Messaging to all of my app\'s users, but I have a web-only app. I\'ve seen solutions that appear to be

Answer 1

Any one looking for php solution find below since you are going to use Api key of server so don't do this on client side

client side fire base js code

// Initialize Firebase
var config = {
    apiKey: "xxxx",
    authDomain: "yyy",
    databaseURL: "zzzz",
    projectId: "aaaa",
    storageBucket: "bbbbb",
    messagingSenderId: "ccc"
  };
firebase.initializeApp(config);

const messaging = firebase.messaging();

messaging.requestPermission()
.then(function() {
  console.log('Notification permission granted.');
  return messaging.getToken();
})
.then(function(token) {

//send this token to server
  console.log(token); // Display user token
})
.catch(function(err) { // Happen if user deney permission

  console.log('Unable to get permission to notify.', err);
});

messaging.onMessage(function(payload){
    console.log('onMessage',payload);
})

server side code by php curl

$headers = array
    ('Authorization: key=' . API_ACCESS_KEY,
    'Content-Type: application/json');

$ch = curl_init();
// browser token you can get it via ajax from client side
$token = 'drVdtCt82qY:APA91bEZb99GvoS9knv-cp5ThVBiYGBjUwl_Ewj2tKaRFwp7HoG347utaNKbgLWmkxpGadABtIg-DspPUh5sC_bc2JrBKVw10Ejg72nYxZgD2wBU-adYJo0yi03lX22s5K2UEp6gwnMv';
curl_setopt($ch, CURLOPT_URL, "https://iid.googleapis.com/iid/v1/$token/rel/topics/testIshakTopic");
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, array());
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
echo "The Result : " . $result;

Hope it will help for PHP developers