DOMXPath匹配文本

Question

代码示例：

​

$html = <<<END
  <tr>
    <td>Text-1</td>
  </tr>

  <tr>
    <td>Blah 1</td>
    <td>Blah 2</td>
    <td>Blah 3</td>
    <td>Blah 4</td>
  </tr>

  <tr>
    <td>Text-2</td>
  </tr>

  <tr>
    <td>Blah 1</td>
    <td>Blah 2</td>
    <td>Blah 3</td>
    <td>Blah 4</td>
  </tr>
END;

$dom = new DOMDocument(); 
$dom->preserveWhiteSpace = false;
$dom->loadhtml($html);
$xpath = new DOMXPath($dom);

   // Grab the text
$nodes = $xpath->query('//td[contains(text(), "Text-2")]|//td[contains(text(), "Blah 1")]/following-sibling::td');

echo $nodes->item(0)->textContent;

​

我尝试在Text-2下抓取Bla2，问题是在Text-1下抓取Bla2

Answer 1

首先，找到具有<td>子级和"Text-2"的<tr>，然后向下遍历下一个同级，直到找到一个具有"Blah 1"的<td>。答案是它的下一个兄弟。

//tr[contains(td/text(), "Text-2")]/following-sibling::tr/td[contains(text(), "Blah 1")]/following-sibling::td'

Answer 2

找到了答案：

​

//*[text()='Text-2']/following::td[text()='Blah 1']/following-sibling::td

​