如何将 PHP DOMElement 转换为 PHP DOMNodeList

Question

I have a situation where I have a little function like below...

public function childUpdate($nodes, $newValue) {
    //Update values of each node
    foreach ($nodes as $child) {
        $child->nodeValue = $newValue;
    }
}

This works perfectly whenever my function is sent a DOMNodeList but occasionally it can be sent a DOMElement instead.

This is a problem as in that situation, the foreach ($nodes as $child) { line fails as foreach does not work on a single element, and requires a list.

So my question is -- is there an elegant way to quickly convert a DOMElement into a DOMNodeList with just that one element inside it?

The obvious first thought is to wrap the DOMElement inside an array like array(DOMElement) , and while that works for this function above, it does fail in other situations where I rely on DOMNodeList specific features.

A simple way to convert DOMElement into a DOMNodeList would really simplify my code and remove a lot of "if 'element' do this, this 'list' do that" conditions.

Answer 1

Having the same problem.

With advice from: How to add elements to DOMNodeList in PHP?

Create a DOMDocument, add the DOMElement to it, and get childNodes which is a DOMNodeList

if(!property_exists($data,'length')) {
  $doc = new DOMDocument();
  $elem = $doc->importNode($data);
  $doc->appendChild($elem);
  $nodeList = $doc->childNodes;
}

Answer 2

如果您有文档的 DOMXPath，则可以使用

 $nodeList = $xpath->query(".", $node);