使用PHP XPath采集的时候，如何保留nodeValue里的html符号

代码如下：

<code>$html = 


    <meta charset="UTF-8">
    <title>Test</title>


<div id="content">
  <p>
    <span>
      abcdefghijklmn<br>opqrstuvwxyz
    </span>
  </p>
</div>



EOF;
// create document object model
$dom = new DOMDocument();
// load html into document object model
@$dom->loadHTML($html);
// create domxpath instance
$xPath = new DOMXPath($dom);
// get all elements with a particular id and then loop through and print the href attribute
$elements = $xPath->query('//*[@id="content"]/p/span');
$content = $elements->item(0)->nodeValue;
echo $content;</code>

内容里的<br>会被去除，使用什么操作比如有没有$e->innerHtml之类的，可以保留html标签。

8.18 更新：

<code>$html = 


    <meta charset="UTF-8">
    <title>Test</title>


<div id="content">
  <p>
    <span class="aaa">
      abcdefghijklmn<br><span>opq</span>rstuvwxyz
    </span>
  </p>
</div>



EOF;

// create document object model
$dom = new DOMDocument();
// load html into document object model
@$dom->loadHTML($html);
// create domxpath instance
$xPath = new DOMXPath($dom);
// get all elements with a particular id and then loop through and print the href attribute
$elements = $xPath->query('//*[@id="content"]/p/span');
$nodeName = $elements->item(0)->nodeName;
// $content = $elements->item(0)->nodeValue;
$content = $dom->saveXml($elements->item(0));
$content = $dom->saveHtml($elements->item(0));
$content = preg_replace(array("#^#isU", "#{$nodeName}>$#isU"), array('', ''), $content);
echo $content;</code>

回复内容：

代码如下：

<code>$html = 


    <meta charset="UTF-8">
    <title>Test</title>


<div id="content">
  <p>
    <span>
      abcdefghijklmn<br>opqrstuvwxyz
    </span>
  </p>
</div>



EOF;
// create document object model
$dom = new DOMDocument();
// load html into document object model
@$dom->loadHTML($html);
// create domxpath instance
$xPath = new DOMXPath($dom);
// get all elements with a particular id and then loop through and print the href attribute
$elements = $xPath->query('//*[@id="content"]/p/span');
$content = $elements->item(0)->nodeValue;
echo $content;</code>

内容里的<br>会被去除，使用什么操作比如有没有$e->innerHtml之类的，可以保留html标签。

8.18 更新：

<code>$html = 


    <meta charset="UTF-8">
    <title>Test</title>


<div id="content">
  <p>
    <span class="aaa">
      abcdefghijklmn<br><span>opq</span>rstuvwxyz
    </span>
  </p>
</div>



EOF;

// create document object model
$dom = new DOMDocument();
// load html into document object model
@$dom->loadHTML($html);
// create domxpath instance
$xPath = new DOMXPath($dom);
// get all elements with a particular id and then loop through and print the href attribute
$elements = $xPath->query('//*[@id="content"]/p/span');
$nodeName = $elements->item(0)->nodeName;
// $content = $elements->item(0)->nodeValue;
$content = $dom->saveXml($elements->item(0));
$content = $dom->saveHtml($elements->item(0));
$content = preg_replace(array("#^#isU", "#{$nodeName}>$#isU"), array('', ''), $content);
echo $content;</code>

自己找到了办法。。。

<code>$content = $elements->item(0)->nodeValue;

// >> 改成 >>

$content = $dom->saveXml($elements->item(0));</code>