php - 如何向多个主题发送 FCM 推送通知

Question

我正在使用 php 服务器发送 FCM 推送通知。我想知道如何同时向多个主题发送推送通知。

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);
}

Answer 1

您使用 condition 键发送到多个主题。

例如:

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

这会将消息发送到订阅主题“狗”或“猫”的设备。

相关引自FCM docs :

To send to combinations of multiple topics, the app server sets the condition key to a boolean condition that specifies the target topics.

请注意，您只能使用 2 个 bool 条件，这意味着您最多可以向 3 个主题发送一条消息。

更新:现在您可以包含 5 个主题。

You can include up to five topics in your conditional expression, and parentheses are supported. Supported operators: &&, ||, !. Note the usage for !:

阅读文档: https://firebase.google.com/docs/cloud-messaging/send-message