PHP Firebase HTTP v1 API 新版推送

//最近一個公司項目需要對接firebase推送，官方文檔就是謝特,再網上找了很多大神的資料，還是有很多坑，把自己踩的坑記錄一下,平時都是伸手黨，這次回饋一下

use Google\Client;

/**
 * 註意需要準備vpn
 * 1.安裝sdk composer require google/apiclient:^2.12.1
 * 2.firebase推送，如要本地調試需找到vendor/guzzlehttp/guzzle/src/Handler/CurlFactory.php 中 applyHandlerOptions 方法，設置$options['verify'] = false;
 * @param $param ['title'=>推送標題，'body'=>推送信息]
 * @param $token 設備token
 * @return bool|string
 */
public function send($param, $token)
{
    $client = new Client();
    $client->useApplicationDefaultCredentials();
    $client->setAuthConfig($this->app->getRootPath() . 'public/path/to/xxxx-xxxx-3f599409d1e3.json');//引入json秘鑰
    $client->setScopes('https://www.googleapis.com/auth/firebase.messaging');     # 授予訪問 FCM 的許可權
    // 你的 Firebase 項目 ID
    $project      = "firebase-aca99";
    $send_url     = "https://fcm.googleapis.com/v1/projects/{$project}/messages:send";
    $access_token = $client->fetchAccessTokenWithAssertion();//獲取秘鑰
    if (!isset($access_token['access_token'])) {
        Log::error('推送失敗，未獲取到秘鑰');
        return false;
    }
    $accessToken = $access_token['access_token'];//秘鑰
    //推送參數
    $params = [
        "message" => [
            "token"        => $token, //需要發送的設備號
            "notification" => $param
        ]
    ];
    //header請求頭，$accessToken 就是你上面獲取的令牌
    $header = [
        'Content-Type: application/json',
        'Authorization: Bearer ' . $accessToken,
    ];
    $response = http_post($send_url, json_encode($params), ['headers' => $header]);
    $response = json_decode($response,true);
    if(isset($response['name'])){
        return true;
    }elseif(isset($response['error'])){
        Log::error("推送失敗:{$response['error']['code']},{$response['error']['message']}");
        return false;
    }