Delete XML node in PHP

Question

    $xmldoc = new DOMDocument();
    $xmldoc->load('card.xml');
    $root   = $xmldoc->documentElement;
    $fnode  = $root->firstChild;
    // we retrieve the chapter and remove it from the book
    $items = $xmldoc->getElementsByTagName('card');
    foreach ($items as $item){
        $node = $item->getElementsByTagName('cardnumber')->item(0);
        if ($node->nodeValue == $this->cardnumber){
            $node->parentNode->removeChild($node);
            $xmldoc->saveXML();
        }
    }

Above is the code I used to delete the card node if the card number is match, below is my XML format. But if failed to remove the card. Can anyone help?

<root>
  <card>
    <cardnumber>12345</cardnumber>
    <name>Tan</name>
  </card>
  ....
</root>

why do you $xmldoc->saveXML(); inside the loop ? saveXML returns the xml string - what I guess you need is $xmldoc->save([file] http://www.php.net/manual/en/domdocument.save.php — Adidi
– Adidi, Commented Apr 23, 2013 at 10:21
I think essentially what @Adidi is saying is that you're not saving the file after deleting, so any changes you make are being forgotten. — Jose Salvatierra
– Jose Salvatierra, Commented Apr 23, 2013 at 10:23

michi · Accepted Answer · 2013-04-23 10:45:09Z

3

Delete <card> with id=2 with simplexml:

$xml = simplexml_load_string($x); // assume XML in $x
$i = count($xml) - 1; 

for ($i; $i >= 0; $i--) {   
    $card = $xml->card[$i];
    if ($card['id'] == "2") unset($xml->card[$i]);
}

see it working : http://codepad.viper-7.com/9cX1qR

answered Apr 23, 2013 at 10:45

michi

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Comments

Vinoth Babu · Accepted Answer · 2013-04-23 10:24:20Z

0

The way you have removed the node is correct. But you to save it in an xml after saveXml() or you can just print the new xml and check for the update you have done. And also as per your logic save should be done after the loop. (i.e) as follows,

$xmldoc = new DOMDocument();
$xmldoc->load('card.xml');
$root   = $xmldoc->documentElement;
$fnode  = $root->firstChild;
// we retrieve the chapter and remove it from the book
$items = $xmldoc->getElementsByTagName('card');
foreach ($items as $item){
    $node = $item->getElementsByTagName('cardnumber')->item(0);
    if ($node->nodeValue == $this->cardnumber){
        $node->parentNode->removeChild($node);            
    }
}
$xmldoc->save('newXmlFile.xml');

(OR)

print $xmldoc->saveXML();

answered Apr 23, 2013 at 10:24

Vinoth Babu

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1 Comment

user236501 Over a year ago

Hi, if I want delete whole card instead that particular cardnumber node, so far it will only delete the cardnumber node instead whole card.

Floern · Accepted Answer · 2017-04-27 19:09:39Z

0

$xmlDoc->getElementsByTagName("nameNode")->item(0)->parentNode
    ->removeChild($xmlDoc->getElementsByTagName("nameNode")->item(0));

edited Apr 27, 2017 at 19:09

Floern

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answered Apr 27, 2017 at 19:03

Bogdan

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