未知的异常'DOMException'与消息'层次结构请求错误' [英] Uncaught exception 'DOMException' with message 'Hierarchy Request Error'

问题描述

需要的是：

我想把它改成..

 <？xml version =1.0？> 
< contacts> 
< person> Adam< / person> 
< person> Eva< / person> 
< person> John< / person> 
< person> Thomas< / person> 
< / contacts> 
  

喜欢这个

 code><？xml version =1.0？> 
< contacts> 
< person> Adam< / person> 
< p> 
< person> Eva< / person> 
< / p> 
< person> John< / person> 
< person> Thomas< / person> 
< / contacts> 
  

错误是

致命错误：未捕获的异常DOMException，消息为层次结构请求错误

我的代码是

  function changeTagName（$ changeble）{
 for（$ index = 0; $ index< count（$ changeble）; $ index ++）{ 
 $ new = $ xmlDoc-> createElement（p）; 
 $ new  - > setAttribute（channel，wp.com）; 
 $ new  - > appendChild（$ changeble [$ index]）; 
 $ old = $ changeble [$ index]; 
 $ result = $ old-> parentNode-> replaceChild（$ new，$ old）; 
} 
} 
  

解决方案

在PHP中使用 DOMDocument 的层次结构请求错误意味着您正在尝试将节点移动到自身中。请与以下图片中的蛇进行比较：

类似的是你的节点。将节点移动到本身。这意味着，当你想用该段替换人的那一刻，该人已经是该段落的孩子了。

appendChild（）方法有效地将人移出DOM树，它不再是部分：

  $ para = $ doc- >的createElement（ p）; 
 $ para-> setAttribute（'attr'，'value'）; 
 $ para-> appendChild（$ person）; 
 
<？xml version =1.0？> 
< contacts> 
< person> Adam< / person> 
 
< person> John< / person> 
< person> Thomas< / person> 
< / contacts> 
  

伊娃已经走了。它的 parentNode 已经是段落了。

所以，您首先要替换，然后追加孩子：

  $ para = $ doc-> createElement（p）; 
 $ para-> setAttribute（'attr'，'value'）; 
 $ person = $ person-> parentNode-> replaceChild（$ para，$ person）; 
 $ para-> appendChild（$ person）; 
 
<？xml version =1.0？> 
< contacts> 
< person> Adam< / person> 
< p attr =value>< person> Eva< / person>< / p> 
< person> John< / person> 
< person> Thomas< / person> 
< / contacts> 
  

现在一切都很好。

I'm getting error while replacing or adding a child into a node.

Required is :

I want to change this to..

<?xml version="1.0"?>
<contacts>
  <person>Adam</person>
  <person>Eva</person>
  <person>John</person>
  <person>Thomas</person>
</contacts>

like this

<?xml version="1.0"?>
<contacts>
  <person>Adam</person>
  <p>
      <person>Eva</person>
  </p>
  <person>John</person>
  <person>Thomas</person>
</contacts>

error is

Fatal error: Uncaught exception 'DOMException' with message 'Hierarchy Request Error'

my code is

function changeTagName($changeble) {
    for ($index = 0; $index < count($changeble); $index++) {
        $new = $xmlDoc->createElement("p");
        $new ->setAttribute("channel", "wp.com");
        $new ->appendChild($changeble[$index]);
        $old = $changeble[$index];
        $result = $old->parentNode->replaceChild($new , $old);
    }
}

解决方案

The error Hierarchy Request Error with DOMDocument in PHP means that you are trying to move a node into itself. Compare this with the snake in the following picture:

Similar this is with your node. You move the node into itself. That means, the moment you want to replace the person with the paragraph, the person is already a children of the paragraph.

The appendChild() method effectively already moves the person out of the DOM tree, it is not part any longer:

$para = $doc->createElement("p");
$para->setAttribute('attr', 'value');
$para->appendChild($person);

<?xml version="1.0"?>
<contacts>
  <person>Adam</person>

  <person>John</person>
  <person>Thomas</person>
</contacts>

Eva is already gone. Its parentNode is the paragraph already.

So Instead you first want to replace and then append the child:

$para = $doc->createElement("p");
$para->setAttribute('attr', 'value');
$person = $person->parentNode->replaceChild($para, $person);
$para->appendChild($person);

<?xml version="1.0"?>
<contacts>
  <person>Adam</person>
  <p attr="value"><person>Eva</person></p>
  <person>John</person>
  <person>Thomas</person>
</contacts>

Now everything is fine.

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