0

我写了一个小辅助函数来使用 xpath 进行基本的搜索替换,因为我发现很容易编写非常简短的操作,同时易于阅读和理解。

代码:

<?php
function xml_search_replace($dom, $search_replace_rules) {
    if (!is_array($search_replace_rules)) {
        return;
    }

    $xp = new DOMXPath($dom);

    foreach ($search_replace_rules as $search_pattern => $replacement) {
        foreach ($xp->query($search_pattern) as $node) {
            $node->nodeValue = $replacement;
        }
    }
}

问题是现在我需要对 XML dom 的不同部分进行不同的“搜索/替换”。我曾希望像下面这样的东西会起作用,但是 DOMXPath 不能使用 DOMDocumentFragment :(

下面示例的第一部分(直到 foreach 循环)就像一个魅力。我正在寻找另一种解决方法的灵感,这种方法仍然简短易读(没有太多样板)。

代码:

<?php
$dom = new DOMDocument;
$dom->loadXml(file_get_contents('container.xml'));
$payload = $dom->getElementsByTagName('Payload')->item(0);

xml_search_replace($dom, array('//MessageReference' => 'SRV4-ID00000000001'));

$payloadXmlTemplate = file_get_contents('payload_template.xml');
foreach (array(array('id' => 'some_id_1'),
               array('id' => 'some_id_2')) as $request) {
    $fragment = $dom->createDocumentFragment();
    $fragment->appendXML($payloadXmlTemplate);
    xml_search_replace($fragment, array('//PayloadElement' => $request['id']));

    $payload->appendChild($fragment);
}
4

1 回答 1

0

感谢弗朗西斯阿维拉,我想出了以下几点:

<?php
function xml_search_replace($node, $search_replace_rules) {
    if (!is_array($search_replace_rules)) {
        return;
    }

    $xp = new DOMXPath($node->ownerDocument);

    foreach ($search_replace_rules as $search_pattern => $replacement) {
        foreach ($xp->query($search_pattern, $node) as $matchingNode) {
            $matchingNode->nodeValue = $replacement;
        }
    }
}

$dom = new DOMDocument;
$dom->loadXml(file_get_contents('container.xml'));
$payload = $dom->getElementsByTagName('Payload')->item(0);

xml_search_replace($dom->documentElement, array('//MessageReference' => 'SRV4-ID00000000001'));

$payloadXmlTemplate = file_get_contents('payload_template.xml');
foreach (array(array('id' => 'some_id_1'),
               array('id' => 'some_id_2')) as $request) {
    $fragment = $dom->createDocumentFragment();
    $fragment->appendXML($payloadXmlTemplate);
    xml_search_replace($payload->appendChild($fragment),
                       array('//PayloadElement' => $request['id']));
}
于 2012-10-09T11:25:47.033 回答