PHP 和 DOM Xpath - 删除 childNode 并排列字符串

Question

我有这个 html 结构：

<html>
  <body>
    <section>
      <div>
        <div>
          <section>
            <div>
              <table>
                <tbody>
                  <tr></tr>
                  <tr>
                    <td></td>
                    <td></td>
                    <td>
                      <i></i>
                      <div class="first-div class-one">
                        <div class="second-div"> soft </div>
                        130 cm / 15cm
                      </div>
                    </td>
                  </tr>
                  <tr></tr>
                </tbody>
              </table>
            </div>
          </section>
        </div>
      </div>
    </section>
  </body>
</html>

现在，我有了这个 XPath 代码：

$doc = new DOMDocument();
@$doc->loadHtmlFile('http://www.whatever.com');
$doc->preserveWhiteSpace = false;

$xpath = new DOMXPath( $doc );

$nodelist = $xpath->query( '/html/body/section/div[2]/section/div/table/tbody/tr[2]/td[3]/div' );
foreach ( $nodelist as $node ) {
    $result = $node->nodeValue."\n";
}

这让我 'soft 130 cm / 15cm' 结果。

但是我想知道如何只得到'15'，所以我需要：

1.要知道如何摆脱 childNode->nodeValue

2。一旦我有了“130 cm / 15cm”，就知道如何只获得“15”作为 PHP.

中变量的节点值

你们能帮忙吗？提前致谢

Answer 1

标签中的文本也是一个节点（子节点），更具体地说是 DOMText。通过查看 div 的子项，您可以找到 DOMText 并获得它的 nodeValue。下面是一个例子：

$doc = new DOMDocument();
$doc->loadHTML("<html><body><p>bah</p>Test</body></html>");
echo $doc->saveHTML();

$xpath = new DOMXPath( $doc );
$nodelist = $xpath->query( '/html/body' );
foreach ( $nodelist as $node ) {
    if ($node->childNodes)
            foreach ($node->childNodes as $child) {
                    if($child instanceof DOMText)
                            echo $child->nodeValue."\n"; // should output "Test".
            }
}

你的第二点可以很容易地用正则表达式来完成：

$string = "130 cm / 15cm";

$matches = array();
preg_match('|/ ([0-9]+) ?cm$|', $string, $matches);

echo $matches[1];

完整解决方案：

<?php

$strhtml = '
<html>
  <body>
    <section>
      <div>
        <div>
          <section>
            <div>
              <table>
                <tbody>
                  <tr></tr>
                  <tr>
                    <td></td>
                    <td></td>
                    <td>
                      <i></i>
                      <div class="first-div class-one">
                        <div class="second-div"> soft </div>
                        130 cm / 15cm
                      </div>
                    </td>
                  </tr>
                  <tr></tr>
                </tbody>
              </table>
            </div>
          </section>
        </div>
      </div>
    </section>
  </body>
</html>';

$doc = new DOMDocument();
@$doc->loadHTML($strhtml);
echo $doc->saveHTML();

$xpath = new DOMXPath( $doc );
$nodelist = $xpath->query( '/html/body/section/div/div/section/div/table/tbody/tr[2]/td[3]/div' );
foreach ( $nodelist as $node ) {
    if ($node->childNodes)
        foreach ($node->childNodes as $child) {
            if($child instanceof DOMText && trim($child->nodeValue) != "")
            {
                echo 'Raw: '.trim($child->nodeValue)."\n";
                $matches = array();
                preg_match('|/ ([0-9]+) ?cm$|', trim($child->nodeValue), $matches);
                echo 'Value: '.$matches[1]."\n";
            }
       }
}

PHP 和 DOM Xpath - 删除 childNode 并排列字符串

PHP with DOM Xpath - Remove childNode and arrange string

php

domxpath