Laravel使用Firebase向Android发送通知

Question

我正在使用后端通过laravel通过laravel向android发送通知，但出现错误“将.json附加到您的请求URI以使用REST API”。使用Postman我正在运行此api

This is function which is used to get notification in json in my controller

public function sendNotification(Request $req)
{
        $fcmUrl = 'https://playout-52d1f.firebaseio.com';
        $token=$req->input('token');
        $title=$req->input('title');

        $notification = [
            'title' => $title,
            'sound' => true,
        ];

        $extraNotificationData = ["message" => $notification,"moredata" =>'dd'];

        $fcmNotification = [
            //'registration_ids' => $tokenList, //multple token array
            'to'        => $token, //single token
            'notification' => $notification,
            'data' => $extraNotificationData
        ];

        $headers = [
            'Authorization: key=AIzaSyDF4_rqij_Bt4zC3GNEVbNFvwX1HHxy5Mo',
            'Content-Type: application/json'
        ];


        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL,$fcmUrl);
        curl_setopt($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($fcmNotification));
        $result = curl_exec($ch);
        curl_close($ch);

       dd($result );

}