如何向多个主题发送 FCM 推送通知

I am using php server to send FCM push notifications. I want to know how I can send push notifications to multiple topics at the same time.

这是我的代码.

function sendPush($topic,$msg){
$API_ACCESS_KEY = '...';
$msg = array
(
    'msg' => $msg
);

$fields = array('to' => '/topics/' . $topic, 'priority' => 'high', 'data' => $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));
$pushResult = curl_exec($ch);
curl_close($ch);
}

推荐答案

您可以使用 condition 键发送到多个主题.

{
  "condition": "'dogs' in topics || 'cats' in topics",
  "priority" : "high",
  "notification" : {
    "body" : "This is a Firebase Cloud Messaging Topic Message!",
    "title" : "FCM Message",
  }
}