我有一个节点：
<p>
This is a test node with Figure 1.
</p>
我的目标是用一个子节点取代"图1"：
<xref>Figure 1</xref>
因此，最终结果将是：
<p>
This is a test node with <xref>Figure 1</xref>.
</p>
提前谢谢。
Xpath允许您从文档中获取包含字符串的文本节点。然后，必须将其拆分为文本和元素（xref）节点列表，并在文本节点之前插入这些节点。最后删除原始文本节点。
$xml = <<<'XML'
<p>
This is a test node with Figure 1.
</p>
XML;
$string = 'Figure 1';
$dom = new DOMDocument();
$dom->loadXml($xml);
$xpath = new DOMXpath($dom);
// find text nodes that contain the string
$nodes = $xpath->evaluate('//text()[contains(., "'.$string.'")]');
foreach ($nodes as $node) {
// explode the text at the string
$parts = explode($string, $node->nodeValue);
// add a new text node with the first part
$node->parentNode->insertBefore(
$dom->createTextNode(
// fetch and remove the first part from the list
array_shift($parts)
),
$node
);
// if here are more then one part
foreach ($parts as $part) {
// add a xref before it
$node->parentNode->insertBefore(
$xref = $dom->createElement('xref'),
$node
);
// with the string that we used to split the text
$xref->appendChild($dom->createTextNode($string));
// add the part from the list as new text node
$node->parentNode->insertBefore(
$dom->createTextNode($part),
$node
);
}
// remove the old text node
$node->parentNode->removeChild($node);
}
echo $dom->saveXml($dom->documentElement);
输出：
<p>
This is a test node with <xref>Figure 1</xref>.
</p>
您可以首先使用getElementsByTagName()查找要查找的节点，并从该节点的nodeValue中删除搜索文本。现在，创建新节点，将nodeValue设置为搜索文本，并将新节点附加到主节点：
<?php
$dom = new DOMDocument;
$dom->loadHTML('<p>This is a test node with Figure 1</p>');
$searchFor = 'Figure 1';
// replace the searchterm in given paragraph node
$p_node = $dom->getElementsByTagName("p")->item(0);
$p_node->nodeValue = str_replace($searchFor, '', $p_node->nodeValue);
// create the new element
$new_node = $dom->createElement("xref");
$new_node->nodeValue = $searchFor;
// append the child element to paragraph node
$p_node->appendChild($new_node);
echo $dom->saveHTML();
输出：
<p>This is a test node with <xref>Figure 1</xref></p>
演示