CODEWITHSUNDEEP
androidgoogle-cloud-messaging
Zarul Izham
Zarul Izham

Reputation: 591

GCM Send notification to many groups

I implementing GCM for group messaging. My situation:

Referring to https://developers.google.com/cloud-messaging/notifications, I can send notification to GROUP 1, but it is impossible to send to both group (GROUP 1 and 2).

Here's my code:

<?php
define( 'API_ACCESS_KEY', 'MyAPI' );

$notification_key = 'notificationKeyHere';

// prep the bundle
$msg = array
(
    'message'   => 'here is a message. message',
    'title'     => 'This is a title. title',
    'subtitle'  => 'This is a subtitle. subtitle',
    'tickerText'    => 'Ticker text here...Ticker text here...Ticker text here',
    'vibrate'   => 1,
    'sound'     => 1,
    'largeIcon' => 'large_icon',
    'smallIcon' => 'small_icon'
);
$fields = array
(
    'to'    => $notification_key,
    'data'  => $msg
);

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

$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://android.googleapis.com/gcm/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;  ?>

Code above works for sending to only one group. So then later I tried:

$notification_key = array("nKey1", "nKey2");

The error produced:

Field "to" must be a JSON string: ["nKey1", "nKey2"]

So how can I alter my code so that both group can received the notification?

Upvotes: 0

Views: 406

Answers (1)

Yusuf K.
Yusuf K.

Reputation: 4260

If you are sending messages to a single device use 'to'

 'to'    => $notification_key,
 'data'  => $msg

But if you are sending messages to multiple devices use 'registration_ids', 

$ids = array("nKey1", "nKey2");

and send as

 'registration_ids'  => $ids,
 'data'              => $msg,

Upvotes: 0

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