添加子特定節點

Question

比方說，我已經是我加載一個像這樣的XML文件：

$domtree = new DOMDocument('1.0', 'UTF-8'); 
$domtree->load('test.xml'); 

的XML文件中有這樣的結構：

<software> 
    <info> 
     <version>6.3</version> 
    </info> 
    <some_stuff> 
     <test1> 
      <somedata>adsd</somedata> 
     </test1> 
    </some_stuff> 
</software> 

我如何添加解密的新元素？

我想：

$some_stuff = $domtree->getElementsByTagName('software'); 
$some_stuff = $some_stuff->getElementsByTagName('some_stuff'); 
$funcgroup = $some_stuff->appendChild($domtree->createElement('test2')); 

PHP錯誤：

Call to undefined method DOMNodeList::getElementsByTagName() 

Answer 1

編輯：我站在了錯誤的解決方案......

$domtree是你的對象。您不能將$some_stuff設置爲它的值並將其用作對象。這就是爲什麼你得到未定義的方法錯誤。

這段代碼就可以了（儘管它並不完全達到你想要什麼，我認爲）：

$domtree->loadXML(file_get_contents('test.xml')); 
$some_stuff = $domtree->getElementsByTagName('software'); 
$some_stuff = $domtree->getElementsByTagName('some_stuff'); 
$funcgroup = $domtree->appendChild($domtree->createElement('test2')); 

注意我提到如何將每行的$domtree對象，而不是你設置的變量。

Answer 2

此代碼將工作

$domtree = new \DomDocument("1.0","UTF-8"); 
      $xmlfile = "test.xml"; 
      $domtree->load($xmlfile); 
      $xml_stuff   = $domtree->getElementsByTagName('some_stuff')-> item(0) ; 
      $xmlNode1   = $domtree->createElement('test2'); 
      $xmlNode1   = $xml_stuff->appendChild($xmlNode1); 
      $domtree->preserveWhiteSpace = false; 
      $domtree->FormatOutput=true; 
      $domtree->saveXML(); 
      $domtree->save($xmlfile);