如何將名爲_（下劃線）的對象存入變量

Question

我有以下對象。在這種情況下，我怎樣才能得到GrossAmount（1.10）的價值作爲變量？

我曾嘗試：

$gross = $object->GrossAmount->_; 

而$id = $object->GrossAmount->currencyID;

確實給我的GBP

當前代碼但是這是行不通的。

Array 
(
    [TransactionID] => 9BBXH1113VA716445A 
    [ParentTransactionID] => 
    [ReceiptID] => 
    [TransactionType] => express-checkout 
    [PaymentType] => instant 
    [PaymentDate] => 2013-02-28T18:26:43Z 
    [GrossAmount] => stdClass Object 
     (
      [_] => 1.10 
      [currencyID] => GBP 
     ) 

    [FeeAmount] => stdClass Object 
     (
      [_] => 0.21 
      [currencyID] => GBP 
     ) 

    [TaxAmount] => stdClass Object 
     (
      [_] => 0.00 
      [currencyID] => GBP 
     ) 

    [ExchangeRate] => 
    [PaymentStatus] => Completed 
    [PendingReason] => none 
    [ReasonCode] => none 
) 

Answer 1

你的頂級對象是一個數組，而不是一個對象。所以你應該使用$object['GrossAmount']->_來訪問該字段。

Answer 2

您可以用

$gross = $object->GrossAmount->{"_"}; 

Answer 3

根本就

$object->GrossAmount->{'_'}