php - 在 PHP 中删除 XML 节点

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();
        }
    }

如果卡号匹配，上面是我用来删除卡节点的代码，下面是我的XML格式。但是如果拔卡失败。任何人都可以帮忙吗？

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

Answer 1

删除 <card>与 id=2与 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]);
}

看到它工作: http://codepad.viper-7.com/9cX1qR