我没有从php中的xml响应中获取属性名称？

Question

我从API获得XML响应，但我遇到了一个小问题。我无法从XML响应中获取name属性。

我正在共享图像XML响应数据。

这是我的代码，我试图获得name属性，但我不能这样做请帮帮我。

$xml = new SimpleXMLElement($response);
    echo "<pre>"; print_r($xml);die();

当我执行上面的代码时，它不显示name属性，如order_id, origin,destination。它显示0,1,2键而不是显示name属性。

SimpleXMLElement Object
(
    [@attributes] => Array
        (
            [version] => 1.0
        )

    [object] => SimpleXMLElement Object
        (
            [@attributes] => Array
                (
                    [pk] => 1
                    [model] => awb
                )

            [field] => Array
                (
                    [0] => 899594723
                    [1] => 800000041
                    [2] => 1.13
                    [3] => JHANSI - JHA
                    [4] => DELHI - DLO
                    [5] => DELHI - DLO
                    [6] => DLO
                    [7] => KAMASHYA ONLINE SHOPPING - 331428
                    [8] => R G
                    [9] => 28-Jan-2018
                    [10] => Delivered / Closed
                    [11] => Delivered
                    [12] => 999 - Delivered
                    [13] => Delivered
                    [14] => 999
                    [15] => Self:R G: Android
                    [16] => 0.0000000
                    [17] => 0.0000000
                    [18] => 01-Feb-2018
                    [19] => 01-Feb-2018
                    [20] => 01-Feb-2018 12:44
                    [21] => 2018-02-01 12:43:00
                    [22] => None
                    [23] => 0
                    [24] => 2018-02-01 12:44:20
                    [25] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rts_system_delivery_status
                                )

                        )

                    [26] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rts_reason_code_number
                                )

                        )

                    [27] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rts_last_update
                                )

                        )

                    [28] => 110019
                    [29] => DELHI
                    [30] => New Delhi
                    [31] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => delivery_pod_image
                                )

                        )

                    [32] => http://api3.ecomexpress.in//static/lastmile//sign/2018/2/1/sign_899594723_2018020112441517469260.png
                    [33] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rev_pickup_signature
                                )

                        )

                    [34] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rev_pickup_packed_image
                                )

                        )

                    [35] => SimpleXMLElement Object
                        (
                            [@attributes] => Array
                                (
                                    [type] => CharField
                                    [name] => rev_pickup_open_image
                                )

                        )

                 )
)
)

Answer 1

如果您阅读了SimpleXML，那么您会发现执行print_r并不能提供所有数据。如果您想要name元素的field属性，那么您可以执行以下操作...

$xml = new SimpleXMLElement($response);
foreach ( $xml->object[0]->field as $field )   {
    echo $field['name'].PHP_EOL;
}

foreach将获取加载的XML，然后选择第一个object元素（[0]将选择第一个元素）并且在每个field元素中。 echo行使用数组表示法来获取name属性。

如果你想要一个特定的object元素，那么你可以使用XPath来找到这个对象并执行与上面相似的操作并打印出来的每个元素......

$objectRec = $xml->xpath('//object[@pk="2"]')[0];
foreach ( $objectRec->field as $field )   {
    echo $field['name'].PHP_EOL;
}

上面的XPath，挑出<object pk="2"...>元素。请注意->xpath()返回一个匹配节点数组，所以我再次使用第一个节点（[0]）。

为帮助检查您选择的元素以及print_r何时没有多大帮助，您可以使用asXML()输出节点的XML ...

$objectRec = $xml->xpath('//object[@pk="1"]')[0];
echo $objectRec->asXML();