转换为PHP对象的XML API响应中的访问数组

有人知道如何访问SOAP API返回的SimpleXMLElement对象中的

[@attributes]

数组吗

我无法检索

[@attributes]

数组的

TotalAmount

元素的值。

@

就是我被卡住的地方

下面是返回完整响应的代码的结尾：

$response = curl_exec($ch);
$xml = simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOWARNING);
$xml_response = $xml->children('http://schemas.xmlsoap.org/soap/envelope/')->Body->children();
echo '<pre>';
print_r($xml_response);
echo '</pre>';

这将检索我想要的数据部分，但我不知道如何访问

[@attributes]

数组

SimpleXMLElement Object
(
    [CalculatePostageRateResponse] => SimpleXMLElement Object
        (
            [PostageRateResponse] => SimpleXMLElement Object
                (
                    [Status] => 0
                    [Zone] => 5
                    [PostagePrice] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [TotalAmount] => 8.15
                                )

                            [MailClass] => Priority
                            [Postage] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [TotalAmount] => 8.15
                                        )

                                    [MailService] => Priority Mail
                                    [Zone] => 5
                                    [IntraBMC] => false
                                    [Pricing] => CommercialBase
                                )

                            [Fees] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [TotalAmount] => 0
                                        )

                                    [CertificateOfMailing] => 0
                                    [CertifiedMail] => 0
                                    [CollectOnDelivery] => 0
                                    [DeliveryConfirmation] => 0
                                    [ElectronicReturnReceipt] => 0
                                    [InsuredMail] => 0
                                    [RegisteredMail] => 0
                                    [RestrictedDelivery] => 0
                                    [ReturnReceipt] => 0
                                    [ReturnReceiptForMerchandise] => 0
                                    [SignatureConfirmation] => 0
                                    [SpecialHandling] => 0
                                    [MerchandiseReturn] => 0
                                    [OpenAndDistribute] => 0
                                    [AdultSignature] => 0
                                    [AdultSignatureRestrictedDelivery] => 0
                                    [LiveAnimalSurcharge] => 0
                                    [FragileHandling] => 0
                                    [AMDelivery] => 0
                                    [GroupedExtraServices] => SimpleXMLElement Object
                                        (
                                            [@attributes] => Array
                                                (
                                                    [Services] => 
                                                )

                                            [FeeAmount] => 0
                                        )

                                )

                            [DeliveryTimeDays] => 2
                            [EstimatedDeliveryDate] => 6/1/2018
                            [DdpRate] => 0
                        )

                )

        )

)

我将非常感谢任何帮助

下面是整个$xml\u响应：

$response = curl_exec($ch);
$xml = simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOWARNING);
$xml_response = $xml->children('http://schemas.xmlsoap.org/soap/envelope/')->Body->children();
echo '<pre>';
print_r($xml_response);
echo '</pre>';

$postage = $xml_response->CalculatePostageRateResponse->PostageRateResponse->PostagePrice->Postage[0]['TotalAmount'];

---

解决方案

$postage = $xml_response->CalculatePostageRateResponse->PostageRateResponse->PostagePrice->Postage[0]['TotalAmount'];