如何将名为_(下划线)的对象访问到变量中

Question

我有以下对象。在这种情况下，如何将GrossAmount (1.10)的值作为变量获取？

我试过了：

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

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

为我提供了GBP的当前代码

但这不管用。

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

嗯，你的顶级对象是一个数组，而不是一个对象。因此，您应该使用$object['GrossAmount']->_来访问该字段。

Answer 2

简单地做

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

Answer 3

您可以尝试使用

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