blocks|key|1025020|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1025021|$doc+=+new+DOMDocument();
$doc->loadHTML($html);
showDOMNode($doc);

function+showDOMNode(DOMNode+$domNode)+{
++++foreach+($domNode->childNodes+as+$node)
++++{
++++++++print+$node->nodeName.':'.$node->nodeValue;
++++++++if($node->hasChildNodes())+{
++++++++++++showDOMNode($node);
++++++++}
++++}++++
}|code-block|syntax|javascript|1025022|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this:

<pre><code>$doc = new DOMDocument();
$doc-&gt;loadHTML($html);
showDOMNode($doc);

function showDOMNode(DOMNode $domNode) {
 foreach ($domNode-&gt;childNodes as $node)
 {
 print $node-&gt;nodeName.':'.$node-&gt;nodeValue;
 if($node-&gt;hasChildNodes()) {
 showDOMNode($node);
 }
 } 
}
</code></pre>

blocks|key|1025133|text|我遇到了具有c数据的元素的问题，在这种情况下，即使是没有子代的元素也会返回子代。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1025134|我不知道为什么会这样。|1025135|我发现周围的工作是改变|1025136|if($node->hasChildNodes())+{
++++++++showDOMNode($node);
++++}|code-block|syntax|javascript|1025137|至|1025138|if($node->childNodes->length+!=+1)+{
++++++++showDOMNode($node);
++++}|1025139|代码现在可以完美地工作了。|1025140|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I was having issues with elements that had c data, where even elements that didn't have children where returning that they did. 

I am not sure why it was.

The work around I found was to change

<pre><code>if($node-&gt;hasChildNodes()) {
 showDOMNode($node);
 }
</code></pre>

to

<pre><code>if($node-&gt;childNodes-&gt;length != 1) {
 showDOMNode($node);
 }
</code></pre>

And the code now works perfectly.

blocks|key|1025218|text|您需要使用PHP+Simple+HTML+DOM+Parser和以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1025219|<?php
require_once+'simplehtmldom/simple_html_dom.php';

function+iterateHtmlElements($html)
{
++++$dom+=+str_get_html($html);
++++$dom->set_callback('handleElement');
++++$dom->__toString();
++++echo+"\n";
}

function+handleElement(simple_html_dom_node+$elem)
{
++++if($elem->tag+==+'text')+{
++++++++echo+$elem->innertext();
++++}
++++else+{
++++++++echo+"\n"+.+$elem->tag+.+":+";
++++}
}

$html='<ul>
+++++++++<li>value1</li>
+++++++++<li>value1</li>
+++++++++<li>value3
++++++++++++subvalue
+++++++++</li>
++++++++</ul>
++++++++hello+world';
iterateHtmlElements($html);|code-block|syntax|javascript|1025220|它完全按照预期工作。我用您提供的输入进行了检查，得到了以下结果：|1025221|>+php+test2.php

ul:
li:+value1
li:+value1
li:+value3
p:+subvalue
p:+hello+world|1025222|entityMap|0|LINK|mutability|MUTABLE|url|http://simplehtmldom.sourceforge.net/^0|5|Q|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

You need to use <a href="http://simplehtmldom.sourceforge.net/" rel="nofollow">PHP Simple HTML DOM Parser</a> and the following code:

<pre><code>&lt;?php
require_once 'simplehtmldom/simple_html_dom.php';

function iterateHtmlElements($html)
{
 $dom = str_get_html($html);
 $dom-&gt;set_callback('handleElement');
 $dom-&gt;__toString();
 echo "\n";
}

function handleElement(simple_html_dom_node $elem)
{
 if($elem-&gt;tag == 'text') {
 echo $elem-&gt;innertext();
 }
 else {
 echo "\n" . $elem-&gt;tag . ": ";
 }
}

$html='&lt;ul&gt;
 &lt;li&gt;value1&lt;/li&gt;
 &lt;li&gt;value1&lt;/li&gt;
 &lt;li&gt;value3
 &lt;p&gt;subvalue&lt;/p&gt;
 &lt;/li&gt;
 &lt;/ul&gt;
 &lt;p&gt;hello world&lt;/p&gt;';
iterateHtmlElements($html);
</code></pre>

It works exactly as expected. I checked it with the input you provided and got the following results:

<pre><code>&gt; php test2.php

ul:
li: value1
li: value1
li: value3
p: subvalue
p: hello world
</code></pre>

blocks|key|1025302|text|一种方法是遍历树，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1025303|function+next_node($node)
{
++++if($node->firstChild+!=+null)
++++{
++++++++return+$node->firstChild;
++++}

++++if($node->nextSibling+!=+null)
++++{
++++++++return+$node->nextSibling;
++++}

++++for($node+=+$node->parentNode;+$node+!=+null;+$node+=+$node->parentNode)
++++{
++++++++if($node->nextSibling+!=+null)
++++++++{
++++++++++++return+$node->nextSibling;
++++++++}
++++}

++++return+null;
}

for($node+=+$doc;+$node+!=+null;+$node+=+next_node($node))
{
++++//+handle+node+(read-only+mode,+if+you+need+read-write
++++//+you+have+to+save+all+the+nodes+in+an+array+and+then
++++//+use+that+array
++++//
++++...
}|code-block|syntax|javascript|1025304|这对大多数文档都有效，但是有时看起来好像没有正确设置parentNode，next_node()函数返回了错误的信息。|offset|length|style|CODE|1025305|entityMap^0|0|0|Q|A|11|B|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

One way is to walk the tree as follow:

<pre><code>function next_node($node)
{
 if($node-&gt;firstChild != null)
 {
 return $node-&gt;firstChild;
 }

 if($node-&gt;nextSibling != null)
 {
 return $node-&gt;nextSibling;
 }

 for($node = $node-&gt;parentNode; $node != null; $node = $node-&gt;parentNode)
 {
 if($node-&gt;nextSibling != null)
 {
 return $node-&gt;nextSibling;
 }
 }

 return null;
}

for($node = $doc; $node != null; $node = next_node($node))
{
 // handle node (read-only mode, if you need read-write
 // you have to save all the nodes in an array and then
 // use that array
 //
 ...
}
</code></pre>

This works for most documents, however it looks like at times the <code>parentNode</code> is somehow not correctly set and the <code>next_node()</code> function ends up returning the wrong information.

I am following the suggestion from this question Robust, <a href="https://stackoverflow.com/questions/292926/robust-mature-html-parser-for-php/321963#321963">Mature HTML Parser for PHP</a>, about parsing html that may be malformed with <a href="http://docs.php.net/manual/en/class.domdocument.php" rel="noreferrer">DOMDocument</a>.

Is there any easy way to loop over the parsed document? So I would like to loop over html like this.

<pre><code>$html='&lt;ul&gt;
 &lt;li&gt;value1&lt;/li&gt;
 &lt;li&gt;value1&lt;/li&gt;
 &lt;li&gt;value3
 &lt;p&gt;subvalue&lt;/p&gt;
 &lt;/li&gt;
 &lt;/ul&gt;
 &lt;p&gt;hello world&lt;/p&gt;';

$doc = new DOMDocument();
$doc-&gt;loadHTML($html);
???
foreach (??? as $node)
{
 print $node-&gt;nodeName.':'.$node-&gt;nodeValue;
}
</code></pre>

And get results somewhat like this.

<pre><code> ul:
 li:value1
 li:value2
 li:value3
 p:subvalue
 p:hello world
</code></pre>

Using <code>$doc-&gt;childNodes</code> by itself doesn't really do what I want. Since it doesn't seem to go down to lower branches in the tree. I used the code suggested by <a href="https://stackoverflow.com/questions/2909849/loop-over-domdocument/2909863#2909863">halfdan</a> and I get results like this.

<pre><code>html:
html:value1
 value1
 value3
 subvalue

 hello world
</code></pre>

Loop over DOMDocument

我正在遵循这个问题的建议，稳健，，关于解析可能格式错误的html。有什么简单的方法可以遍历解析过的文档吗？所以我想像这样在html上循环。$html='<ul> <li>value1</li> <li>value1</li> <li>value3 <...

问在DOMDocument上循环
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