I make basic PayPal payment on sandbox, following instructions on official samples here:

* [CreatePaymentUsingPayPal](http://paypal.github.io/PayPal-PHP-SDK/sample/doc/payments/CreatePaymentUsingPayPal.html)
* [Execution](http://paypal.github.io/PayPal-PHP-SDK/sample/doc/payments/ExecutePayment.html)

The problem appears when my Execution service is getting request from paypal server. After dumping $\_GET variables I can see something like:

```
array:3 [▼
  "paymentId" => "PAY-9HM25571EF136871GLEWZM6A"
  "token" => "EC-6VX65808WU776334M"
  "PayerID" => "2ADP8W2S9ST8Z"
]

```

So there is no variable called "success". If payment ended without success I should get "success": false. I have no idea what is going on and how can I fix it.

Please for help,

Arthur.