NarKampenTake2/ServerFiles/OLDnarKampen/dbFiles/test.php

<?php 
require_once '../vendor/autoload.php';

putenv('GOOGLE_APPLICATION_CREDENTIALS=/home/axel/configs/narkampen-firebase-adminsdk-k42j5-d3d0354e37.json');

$client = new Google_Client();
$client->useApplicationDefaultCredentials();
$client->addScope('https://www.googleapis.com/auth/firebase.messaging');
$httpClient = $client->authorize();

$token = "f2lMMUNKR9SOQcVZFm7VUJ:APA91bHnfv3D2yxAPX9lXT81ovuH6gDgga6ZrNXRwAZZE5xa7AcjWzeKAON-7s1oAVM4AwTSgjb-IkmT5NvujjqSib9wFCcwaPX205dh8rSGAj6ltTp670dTkdbVIykefURMoG8EhFQd";

// Your Firebase project ID
$project = "narkampen";
// Creates a notification for subscribers to the debug topic
$message = [
    "message" => [
        "token" => $token,
        "notification" => [
            "body" => "This is an FCM notification message!",
            "title" => "FCM Message",
        ]
    ]
];
// Send the Push Notification - use $response to inspect success or errors
$response = $httpClient->post("https://fcm.googleapis.com/v1/projects/{$project}/messages:send", ['json' => $message]);

var_dump($response);