为firebase云消息传递PHP生成OAUTH令牌

Question

我有一个PHP页面，我用它向我开发的移动应用程序的用户发送通知，这个页面在上个月之前工作正常，然后它给了我这个错误

{“多播id”：5174063503598899354，“成功”：0，“失败”：1，“规范id”：0，“结果”：[{“错误”：“无效注册”}]}

我试图使用此链接中的留档生成OAUTH令牌https://firebase.google.com/docs/cloud-messaging/auth-server#node.js但它需要NODE. JS服务器，而我的服务器不支持Node。Js，我试图使用Firebase管理员SDK，但找不到任何东西。这里是页面的PHP代码

<?php

//Includes the file that contains your project's unique server key from the Firebase Console.
require_once("serverKeyInfo.php");

//Sets the serverKey variable to the googleServerKey variable in the serverKeyInfo.php script.
$serverKey = $googleServerKey;

//URL that we will send our message to for it to be processed by Firebase.
    $url = "https://fcm.googleapis.com/fcm/send";

//Recipient of the message. This can be a device token (to send to an individual device) 
//or a topic (to be sent to all devices subscribed to the specified topic).
$recipient = $_POST['rec'];

//Structure of our notification that will be displayed on the user's screen if the app is in the background.
$notification =array(
    'title'   => $_POST['title'],
    'body'   => $_POST['body'],
    'sound' => 'default'
);

//Structure of the data that will be sent with the message but not visible to the user.
//We can however use Unity to access this data.
$dataPayload =array( 

    "powerLevel" => "9001",
    "dataString" => "This is some string data"
);

//Full structure of message inculding target device(s), notification, and data.
$fields =array(

    'to'  => $recipient,
    'notification' => $notification,
    'data' => $dataPayload
);

//Set the appropriate headers
$headers = array(

'Authorization: key=' . $serverKey,
'Content-Type: application/json'
);
//Send the message using cURL.
$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 );

//Result is printed to screen.
echo $result;
?>

有人能给我一个例子吗？我怎么能做到这一点（我是PHP初学者）提前谢谢

*更新：我还尝试将代码中的$url更改为

$url = "https://fcm.googleapis.com/v1/projects/notifications-9ccdd/messages:send";

但它给了我这个错误

"错误"：{"代码"： 401，"消息"："请求的身份验证凭据无效。期望OAuth 2访问令牌、登录cookie或其他有效的身份验证凭据。见https://developers.google.com/identity/sign-in/web/devconsole-project."，"状态"："未经验证"}Blockquest

Answer 1

对于仍在寻找答案（2021年）的任何人来说，为了通过自己的PHP系统向Firebase消息系统发送推送消息，您需要来自Google凭据的访问令牌。下面是如何做到这一点-请注意，我只在PHP Laravel中这样做，而不是原始的PHP。但是你应该能够通过修改步骤来找到香草PHP解决方案（同样适用于代码点火器和其他PHP库）

>

安装谷歌API客户端。对于Laravel，这是：

  composer require google/apiclient --with-all-dependencies

打开composer.json，并添加到自动加载数组中。对于Laravel，这是：

 "classmap": [
     "vendor/google/apiclient/src/Google"
 ],

创建一个新的服务类（如果是PHP，则创建一个新类），并添加以下检索访问令牌的方法：

private function getGoogleAccessToken(){

     $credentialsFilePath = 'the-folder-and-filename-of-your-downloaded-service-account-file.json'; //replace this with your actual path and file name
     $client = new \Google_Client();
     $client->setAuthConfig($credentialsFilePath);
     $client->addScope('https://www.googleapis.com/auth/firebase.messaging');
     $client->refreshTokenWithAssertion();
     $token = $client->getAccessToken();
     return $token['access_token'];
}

现在创建一个方法，通过CURL将所有消息信息发送到Firebase：

public function sendMessage(){

 $apiurl = 'https://fcm.googleapis.com/v1/projects/your-project-id/messages:send';   //replace "your-project-id" with...your project ID

 $headers = [
         'Authorization: Bearer ' . $this->getGoogleAccessToken(),
         'Content-Type: application/json'
 ];

 $notification_tray = [
         'title'             => "Some title",
         'body'              => "Some content",
     ];

 $in_app_module = [
         "title"          => "Some data title (optional)",
         "body"           => "Some data body (optional)",
     ];
 //The $in_app_module array above can be empty - I use this to send variables in to my app when it is opened, so the user sees a popup module with the message additional to the generic task tray notification.

  $message = [
        'message' => [
             'notification'     => $notification_tray,
             'data'             => $in_app_module,
         ],
  ];

  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $apiurl);
  curl_setopt($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($message));

  $result = curl_exec($ch);

  if ($result === FALSE) {
      //Failed
      die('Curl failed: ' . curl_error($ch));
  }

  curl_close($ch);

}

谷歌建议，只有在无法将JSON文件作为环境变量直接添加到服务器上时，才使用此方法。我不知道谷歌为什么没有更好的PHP文档，它似乎更喜欢node.js、Go、Java和C。