Question

I want to be able to to delete a node tree if a specific child is empty, but seems to do something wrong?

Here is what I got:

$xml = new DOMDocument();
$xml->loadXML('<?xml version="1.0" encoding="ISO-8859-1"?>
<data>
  <game id="1">
    <opponent>Michael</opponent>
    <oppid>1</oppid>
  </game>
  <game id="2">
    <opponent>Trish</opponent>
    <oppid>55</oppid>
  </game>
  <game id="3">
    <opponent/>
    <oppid>24</oppid>
  </game>
  <game id="4">
    <opponent>Betty</opponent>
    <oppid>12</oppid>
  </game>
</data>

');

echo "<xmp>OLD \n". $xml->saveXML() ."</xmp>";

$xpath = new DOMXpath($xml);
foreach($xpath->query('//game') as $node) {
    if($node->opponent == ''){
        echo 'Test<br>';
        $node->parentNode->removeChild($node);
    }

}

echo "<xmp>NEW \n". $xml->saveXML() ."</xmp>";

I get 4 “Test” printed out and in the NEW xmp I get nothing? What am I doing wrong?

Please help and thanks in advance.

Answer 1

<?php
$xml = new DOMDocument();
$xml->loadXML('<?xml version="1.0" encoding="ISO-8859-1"?>
<data>
<game id="1">
    <opponent>Michael</opponent>
    <oppid>1</oppid>
</game>
<game id="2">
    <opponent>Trish</opponent>
    <oppid>55</oppid>
</game>
<game id="3">
    <opponent/>
    <oppid>24</oppid>
</game>
<game id="4">
    <opponent>Betty</opponent>
    <oppid>12</oppid>
</game>
</data>

');

echo "<xmp>OLD \n". $xml->saveXML() ."</xmp>";

$opNodes = $xml->getElementsByTagName('opponent');
foreach($opNodes as $node) {
    $innerHtml = trim($node->nodeValue);
    if(empty($innerHtml)){
        $gameNode = $node->parentNode;
        $gameNode->parentNode->removeChild($gameNode);
    }
}

echo "<xmp>NEW \n". $xml->saveXML() ."</xmp>";

i wonder why it was not working… now it works .