使用PHP重命名XML节点 [英] Rename an XML node using PHP

问题描述

我试图弄清楚如何使用PHP重命名XML中的节点?

I'm trying to figure out how to rename a node in XML using PHP?

我已经走了这么远:

$dom = new DOMDocument( '1.0' );
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;

// load the xml file
$dom->loadXML( '<?xml version="1.0" encoding="ISO-8859-1"?>
<library>
  <data>
    <invite>
      <username>jmansa</username>
      <userid>1</userid>
    </invite>
    <update>1</update>
  </data>
</library>', LIBXML_NOBLANKS );
$xpath = new DOMXPath($dom);

//find all 'data' nodes.
$node = $xpath->query("//data");

// if found
if( $node->length ) {
    foreach ($node as $n) {
       // RENAME HERE? //
    }
}

echo "<xmp>". $dom->saveXML() ."</xmp>";

现在，我想将<data>重命名为<invites>.可以这样做吗?如果可以，怎么办?

Now, I want to rename <data> to <invites>. Can this be done and if yes, how?

推荐答案

无法通过DOM重命名节点名称(分别为数据"或邀请")，因为

A Node's name ("data" or "invites" respectively) cannot be renamed via the DOM because the Node::nodeName property is read-only.

您可以创建一个名为"invites"的新节点，将其追加到"data"节点之前，将"data"的子级移动到新的"invites"节点，删除"data"节点，然后输出树得到结果.

You can create a new node named "invites", append it before the "data" node, move the children of "data" to the new "invites" node, remove the "data" node, and then output the tree to get your result.

示例:

<?php
// Create a test document.
    $dom = new DOMDocument( '1.0' );
    $dom->preserveWhiteSpace = false;
    $dom->formatOutput = true;

// Load the xml file.
    $dom->loadXML('<?xml version="1.0" encoding="ISO-8859-1"?'.'>
    <library>
      <data attr1="1" attr2="2">
        <invite>
          <username>jmansa</username>
          <userid>1</userid>
        </invite>
        <update>1</update>
      </data>
    </library>', LIBXML_NOBLANKS );
    $xpath = new DOMXPath($dom);

    // Convert <data> to <invites>.
    if ($dataNode = $xpath->query("/library/data")->item(0))
    {
    // Create the <invites> node.
        $invitesNode = $dom->createElement('invites');
        $dataAttrs   = $dataNode->attributes;
        foreach ($dataAttrs as $dataAttr)
        {   $invitesNode->setAttributeNodeNS($dataAttr->cloneNode());   }
        $dom->documentElement->appendChild($invitesNode);

    // Move the <data> children over.
        if ($childNodes = $xpath->query("/library/data/*"))
        {
            foreach ($childNodes as $childNode)
            {   $invitesNode->appendChild($childNode);  }
        }

    // Remove <data>.
        $dataNode->parentNode->removeChild($dataNode);
    }

// Test the result.
    echo $dom->saveXML();
?>

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