NarKampen/dbFiles/FCMNextPlayer.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 = "eMvkzPwkTheSeFLFAE5fho:APA91bE-pb5_0xoMn_Bza6-HrgpI5ufKPZ7zhF4NM_leYdfgYTk4MZJdfpfiKDkijUuQAiK7iaT7rXJucF20uh1GvmgjiomiuQehnDHcjUkGjaSvkQtVfj_s0AtLSP>
*/
$hostname = 'localhost';
$username = 'narKampen';
$pass = 'IfRLzj2HJBXA9eei';
$database = 'narKampen';

$conn = new mysqli($hostname, $username, $pass, $database);
if (!$conn) {
	die("Connection Failed. ". mysqli_connect_error());
}
mysqli_set_charset($conn,'utf8');

$gameId = $conn->real_escape_string($_POST['gameId']);
$playerName = $conn->real_escape_string($_POST['playerName']);

$sql = "SELECT messageToken FROM `gamePlayers` INNER JOIN users ON users.id = playerId WHERE gameId = $gameId and users.username = '$playerName'";

$result = $conn->query($sql);
if ($result->num_rows == 1) {
	$returnArray = array();
	$data = $result->fetch_assoc();
	$token = $data['messageToken'];
} else {
	echo "No games found for user";
}

if ($token != null && $token != "") {
// 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]);

}