使用 DOM 文档循环遍历多个 HTML 元素

Question

我有一个页面看起来像这样：

...
<div class="container">

<div class="info">
<h3>Info 1</h3>
<span class="title">Title for Info 1</span>
<a href="http://www.example.com/1">Link to Example 1</a>
</div> <!-- /info -->

<div class="info">
<h3>Info 2</h3>
<span class="title">Title for Info 2</span>
<a href="http://www.example.com/2">Link to Example 2</a>
</div> <!-- /info -->

<div class="info">
<h3>Info 3</h3>
<span class="title">Title for Info 3</span>
<a href="http://www.example.com/3">Link to Example 3</a>
</div> <!-- /info -->

</div> <!-- /container -->
...

每个info类div的结构都是相同的，我希望能够遍历文档，对于每个具有info类的div，将各个组件解析为数组或单个变量，以便以某种人类可读的格式输出数据，如csv文件或HTML表。

我已经尝试使用DOMDocument方法，并使用getElementByTagName提取每个标记的内容，但是因为div包含多种标记类型(h3，a，span)，所以我还不知道如何完成我要做的事情。

最后，我希望能够将数据转换成这样的格式:

divclass, h3, spanclass, spantitle, ahref, a
info, Info 1, title, Title for Info 1, http://www.example.com/1, Link to Example 1
...

谢谢！

Answer 1

<?php
$html = '
<div class="container">

<div class="info">
<h3>Info 1</h3>
<span class="title">Title for Info 1</span>
<a href="http://www.example.com/1">Link to Example 1</a>
</div> <!-- /info -->

<div class="info">
<h3>Info 2</h3>
<span class="title">Title for Info 2</span>
<a href="http://www.example.com/2">Link to Example 2</a>
</div> <!-- /info -->

<div class="info">
<h3>Info 3</h3>
<span class="title">Title for Info 3</span>
<a href="http://www.example.com/3">Link to Example 3</a>
</div> <!-- /info -->

</div> <!-- /container -->
';


$dom_document = new DOMDocument();

$dom_document->loadHTML($html);
$dom_document->preserveWhiteSpace = false;

//use DOMXpath to navigate the html with the DOM
$dom_xpath = new DOMXpath($dom_document);

$elements = $dom_xpath->query("//*[@class='info']");

if (!is_null($elements)) {

  foreach ($elements as $element) {
    echo "\n[". $element->nodeName. "]";

    $nodes = $element->childNodes;
    foreach ($nodes as $node) {
      echo $node->nodeValue. "\n";
    }

  }
}