使用 php 解析 XML (SRU) [英] Parse XML (SRU) with php

问题描述

我试图解析一个不起作用的 XML 响应.在 API 文档中，它说它是一个基于 XML 的协议:SRU.那么这个 XML 解析代码会起作用吗?还是代码有问题?

I have tried to parse an XML response that does not work. In the API docs it says that it is a XML based protocol: SRU. Wont this XML parsing code work then? Or is it some error in the code?

代码:

$xmldoc = new DOMDocument();
$xmldoc->load('http://api.site.com/sru/query=' . $_GET['q']);
print_r($xmldoc);

$xpathvar = new Domxpath($xmldoc);
$queryResult = $xpathvar->query('//datafield[@tag="020"]/subfield[$code="a"]');
foreach ($queryResult as $result) {
    echo $result->textContent;
    print_r($result);
}

xml 结构:

<searchRetrieveResponse>
    <numberOfRecords>1</numberOfRecords>
    <datafield tag="020" ind1=" " ind2=" ">
        <subfield code="a">xyz</subfield>
    </datafield>

    ...

</searchRetrieveResponse>

推荐答案

$code 中的美元符号(在 xpathvar->query 中)看起来不像不属于那里.根据您的情况，尝试删除或转义美元符号(删除看起来很合适，给出示例 xml).

The dollar sign in $code (in the xpathvar->query) looks like it doesn't belong there. Try either removing or escaping the dollar sign, as appropriate in your case (removing looks appropriate, given the example xml).

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