Php 使用simplexml解析xmldata

我必须解析使用simplexml的xml数据以下是我得到的简单xml对象

SimpleXMLElement Object
(
    [@attributes] => Array
        (
            [version] => 1.2
        )

    [file] => SimpleXMLElement Object
        (
            [@attributes] => Array
                (
                    [source-language] => en
                    [datatype] => plaintext
                    [original] => file.ext
                )

            [body] => SimpleXMLElement Object
                (
                    [trans-unit] => Array
                        (
                            [0] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 1
                                        )

                                    [source] => search_term
                                    [target] => %count% result for "%query%" has been found.|%count% results for "%query%" have been found.
                                    [alt-trans] => SimpleXMLElement Object
                                        (
                                            [target] => Hola mundo
                                        )

                                )

                            [1] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 2
                                        )

                                    [source] => search_noresults
                                    [target] => Sorry, I found no results for your query on the website.
                                )

                            [2] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 3
                                        )

                                    [source] => search_failure
                                    [target] => We are very sorry, but the search service is not available at the moment.
                                )

                            [3] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 4
                                        )

                                    [source] => search
                                    [target] => Search
                                )

                            [4] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 5
                                        )

                                    [source] => previous
                                    [target] => Prev
                                )

                            [5] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 6
                                        )

                                    [source] => next
                                    [target] => Next
                                )

                            [6] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 7
                                        )

                                    [source] => Search this site
                                    [target] => Search this site
                                )

                            [7] => SimpleXMLElement Object
                                (
                                    [@attributes] => Array
                                        (
                                            [id] => 8
                                        )

                                    [source] => send
                                    [target] => Send
                                )

                        )

                )

        )

) 

当我试图通过以下代码解析数据时，会出现问题

$this->glossary = new SimpleXMLElement($this->text);
foreach($this->glossary->file->body->trans-unit as $transunit)
{
  //parsing code
}

我得到一个php错误，因为变量之间不能有“-”，并且我们将trans unit作为对象变量。我们不能更改xml文件，因为它是预定义格式的

我还有一个关于simplexml的问题，我有以下xml单元

    <trans-unit id="1">
        <source>search_term</source>
        <target>%count% result for &quot;%query%&quot; has been found.|%count% results for &quot;%query%&quot; have been found.</target>
        <alt-trans>
        <target xml:lang='es'>Hola mundo</target>
        </alt-trans>
    </trans-unit>

搜索词
%已找到“%query%”的计数%result。|“%query%”的计数%result已找到。
霍拉·蒙多

我想从前面定义的foreach循环中的

标记中提取“lang='es'”名称空间。

第二个问题： 使用

xpath

检索

xml:lang

：

$xml = simplexml_load_string($x); // assume XML in $x

$target = (string)$xml->xpath("//target[@xml:lang]")[0];
$lang = (string)$xml->xpath("//target[@xml:lang]/@xml:lang")[0];

注意：需要PHP>=5.4，如果您的PHP版本低于此版本，请告诉我有一个解决方法

---

请看一下手册中的部分，特别是示例#3。哦，我的天哪，我怎么会错过这一点呢？谢谢，顺便问一下，你能回答我的第二个问题吗