paypal php rest api.响应代码

整个贝宝流程是一场又一场噩梦。除了一个小问题，我已经设法完成了所有的申请。来自贝宝CCD_ 1的响应对象没有文档。我的前端是客户端，所以我真的无法知道这个响应数组包含什么。

到目前为止，我得到的是：

    $paymentId = $this->ppconf; //stores paymentId
    if(empty($paymentId)){Throw New 'Exception('missing payment id'); }
    $payment = Payment::get($paymentId, $apiContext);
    $execution = new PaymentExecution();
    $execution->setPayerId($z);
    $response = $payment->execute($execution, $apiContext); // i need to know what this response array looks like and what the response codes are, so i can generate my $result array for my application.
    $state = $response->getState();
    $failures = ['failed','canceled','expired'];
    if(in_array($state,$failures)){
        $result = ['type'=>'error'];
    }else{
        $result = ['type'=>'success'];
        $this->finished = true;
    }
    return $result;