如何使用php删除基于子属性的XML标记？

Question

I have an XML like below

<entries>
  <entry>
    <title lang="en">Sample</title>
    <entrydate>0</entrydate>
    <contents>0</contents>
    <entrynum>0</entrynum>
  </entry>
  <entry>
    <title lang="fr">Sample</title>
    <entrydate>1</entrydate>
    <contents>1</contents>
    <entrynum>1</entrynum>
  </entry>
</entries>

Is there a way in PHP to delete the parent node (entry) based on the title lang attribute? I need to keep only the en ones, so in this case I would need to get the XML without the second entry node.

I tried looking around but couldn't find any solution...

Answer 1

You need to use DOMDocument class to parse string to XML document. Then use DOMXpath class to find target element in document and use DOMNode::removeChild() to remove selected element from document.

$doc = new DOMDocument(); 
$doc->loadXML($xml);
$xpath = new DOMXpath($doc);
// select target entry tag
$entry = $xpath->query("//entry[title[@lang='fr']]")->item(0);
// remove selected element
$entry->parentNode->removeChild($entry);
$xml = $doc->savexml();

You can check result in demo