如何删除XML元素和所有子元素？

Question

I need to read an XML file and delete all the elements named <images> and all the children associated. I have found similar old questions that did not work. What am I doing wrong? Is there a better method?

XML:

<?xml version='1.0' encoding='UTF-8'?>
<settings>
  <background_color>#000000</background_color>
  <show_context_menu>yes</show_context_menu>
  <image>
    <thumb_path>210x245.png</thumb_path>
    <big_image_path>620x930.png</big_image_path>
  </image>
  <image>
    <thumb_path>200x295.png</thumb_path>
    <big_image_path>643x950.png</big_image_path>
  </image>
</settings>

PHP:

$dom = new DOMDocument();
$dom->load('test.xml');
$thedocument = $dom->documentElement;
$elements = $thedocument->getElementsByTagName('image');

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

$save = $dom->saveXML();
file_put_contents('test.xml', $save)

Answer 1

I figured it out after a good night of sleep. It was quite simple actually.

$xml = simplexml_load_file('test.xml');
unset($xml->image);
$xml_file = $xml->asXML();
$xmlFile = 'test.xml';
$xmlHandle = fopen($xmlFile, 'w');
fwrite($xmlHandle, $xml_file);
fclose($xmlHandle);

Edit: You probably want to make it save directly:

$file = 'test.xml';

$xml = simplexml_load_file($file);
unset($xml->image);
$success = $xml->asXML($file);

See SimpleXMLElement::asXML()^Docs.