如何获取xml元素的值? [英] How to get values of xml elements?

问题描述

我有一些xml数据，并且正在尝试访问某些元素.数据结构 如下所示(使用print_r($ data)). 我可以得到$data->{'parent'}->title，它可以工作，但是如果我尝试使用以下方法获得href的值 $data->{'parent'}->link[0]->{'@attributes'}->href ..它不起作用..任何想法吗?

I have some xml data and I am trying to access some elements. The structure of data is as below (using print_r($data)). I can get $data->{'parent'}->title, it works but if I try to get value of href using $data->{'parent'}->link[0]->{'@attributes'}->href .. it doesnt work .. any ideas?

谢谢

SimpleXMLElement Object
(
    [@attributes] => Array
        (
            [children] => 29
            [modules] => 0
        )
[title] => Test title
[link] => Array
    (
        [0] => SimpleXMLElement Object
            (
                [@attributes] => Array
                    (
                        [href] => data.php?id=2322
                        [rel] => self
                        [type] => application/xml
                    )

            )

        [1] => SimpleXMLElement Object
            (
                [@attributes] => Array
                    (
                        [href] => data.php?id=2342
                        [rel] => alternate
                        [type] => text/html
                    )

            )

    )

[parent] => SimpleXMLElement Object
    (
        [@attributes] => Array
            (
                [children] => 6
                [modules] => 0
            )

        [title] => Top
        [link] => Array
            (
                [0] => SimpleXMLElement Object
                    (
                        [@attributes] => Array
                            (
                                [href] => /data.php?id=5763
                                [rel] => self
                                [type] => application/xml
                            )

                    )

                [1] => SimpleXMLElement Object
                    (
                        [@attributes] => Array
                            (
                                [href] => /data.php?id=2342
                                [rel] => alternate
                                [type] => text/html
                            )

                    )

            )

    )

)

推荐答案

查看 访问@ 中的属性，尤其是对具有误导性的SimpleXML对象的var_dump(print_r)输出的注释.

Check out Accessing @attribute from SimpleXML, especially the comment on the misleading var_dump (print_r) output of SimpleXML Objects.

也就是说，IIRC在您的示例中应该可以使用:

That said, IIRC the following should work in your example:

$data->{'parent'}->link[0]['href']

(也就是说，可以使用标准数组表示法来访问属性-这肯定适用于单个元素，不确定是否可以与元素集合中的附加索引一起使用.)

(That is, the attributes can be accessed using standard array notation - this definitely works on single elements, not sure if it works with the additional index into the element collection.)

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