每个父节点的 PHP replaceChild

Question

我正在使用这个 PHP 代码替换 XML 文件中的一系列节点：

<?php
$xml = "
<products>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
 </product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
</products>
";
 function renameTags($xml, $old, $new)
{
$dom = new DOMDocument();
$dom->loadXML($xml);

$nodes = $dom->getElementsByTagName($old);

$toRemove = array();

foreach ($nodes as $node)
{
$newNode = $dom->createElement($new);

foreach ($node->attributes as $attribute)
{
    $newNode->setAttribute($attribute->name, $attribute->value);
}

foreach ($node->childNodes as $child)
{
    $newNode->appendChild($node->removeChild($child));
}

$node->parentNode->appendChild($newNode);
$toRemove[] = $node;
  break;

}

foreach ($toRemove as $node)
{
  $node->parentNode->removeChild($node);

}

$dom->formatOutput = TRUE;
return $dom->saveXML();
}

$xml = renameTags($xml, 'name', 'Source');
$xml = renameTags($xml, 'name', 'parentCategory');
$xml = renameTags($xml, 'name', 'Category');
$xml = renameTags($xml, 'name', 'subCategory');
$xml = renameTags($xml, 'name', 'sisterCategory');

echo $xml;
?>

但是，此代码仅替代并且仅适用于一组产品。 我想我需要在函数中的某处调用一个由 foreach parentNode('product') 替换标签名称组成的语句。我需要为函数添加什么来迭代所有产品集？

上面的代码会打印出这样的：（注意第一组名字节点已经消失了，被指定的新节点代替了）

<?xml version="1.0"?>
<products>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<Source>Buy</Source>
<parentCategory>Car, Marine &amp; GPS</parentCategory>
<Category>Car Installation Parts</Category>
<subCategory>Deck Installation Parts</subCategory>
<sisterCategory>Antennas &amp; Adapters</sisterCategory></product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
<product>
<ItemId>531670</ItemId>
<modelNumber>METRA ELECTRONICS/MOBILE AUDIO</modelNumber>
<name>Buy</name>
<name>Car, Marine &amp; GPS</name>
<name>Car Installation Parts</name>
<name>Deck Installation Parts</name>
<name>Antennas &amp; Adapters</name>
</product>
</products>

如您所见，它只替换了一个产品实例。

Answer 1

那个 foreach 的中断是你的问题：它停在它遇到的第一个 <name> 节点，不管它在文档中的什么位置。

首先，您必须遍历产品，然后遍历产品的 <name> 节点。类似于以下内容：

function renameTags($xml, $old, $new) {
    $toRemove = array();
    $dom = new DOMDocument();
    $dom->loadXML($xml);
    $products = $dom->getElementsByTagName('product');

    foreach($products as $product) {
        $nodes = $product->getElementsByTagName($old);

        foreach ($nodes as $node) {
            $newNode = $dom->createElement($new);

            foreach ($node->attributes as $attribute) {
                $newNode->setAttribute($attribute->name, $attribute->value);
            }

            foreach ($node->childNodes as $child) {
                $newNode->appendChild($node->removeChild($child));
            }

            $node->parentNode->appendChild($newNode);
            $toRemove[] = $node;

            break;
        }
    }

    foreach ($toRemove as $node) {
      $node->parentNode->removeChild($node);
    }

    $dom->formatOutput = TRUE;
    return $dom->saveXML();
}