选择多个类名称,并使用PHP DOMXpath在该类内获取childnode

<div id="conti">
  <div class="no_matter"></div>
  <div class="row-0">
    <b></b>
    <span>
      <i>"child node that i want to get"</i>
    </span>
  </div>

  <div class="row-1">
    <b></b>
    <span>
      <i>"child node that i want to get"</i>
    </span>
  </div>

  <div class="row-0">
    <b></b>
    <span>
      <i>"child node that i want to get"</i>
    </span>
  </div>

  <div class="row-1">
    <b></b>
    <span>
      <i>"child node that i want to get"</i>
    </span>
  </div>

  ...
  ...
  class row-0 and row-1 repeats itself
  ...
  ...

</div>

这是我要解析并获取内容的HTML.我想要< i>内的文本节点标签.我正在使用DOMDocument和DOMXpath

$dom = new DOMDocument();
$dom->loadHTMLFile('http://www.meal.org/anter.php');
$dom->preserveWhiteSpace = true;

$xpath = new DOMXPath($dom);

$row = $xpath->query('//*[@class="row-0" ]');  //my problem begins there. I want both 'row-0' and 'row-1'. How i am gonna choose multiple class?

//and than how i am gonna get `<i>` tag inside every `row-0` and `row-1` class and get the text node?

解决方法:

您可以使用以下XPath查询完成所有操作：

//*[starts-with(@class,"row-")]/span/i/text()

MDN on starts-with：

The starts-with checks whether the first string starts with the second string and returns true or false.

如果您对这些行中的所有文本节点,b标记中的文本节点以及这些行中可能存在的任何其他标记感兴趣,请使用双斜杠：

//*[starts-with(@class,"row-")]//text()

标签：domdocument,domxpath,php
来源： https://codeday.me/bug/20191027/1943122.html