從HTML獲得domXPath的價值

Question

我需要從html中解析<span id="the_name">標記的內容。
html看起來像這樣：

...
<span id="userName" class="username"></span> 
<div class="main"> 
 <div class="menu"> 
  <div id="totals" class="totals" >
  </div> 
  <ul id="alter_menu"> 
  </ul> 
  <div class="content"> 
   <br /> 
   <table width="70%" style="margin-left: auto; margin-right: auto;"> 
   <tr> 
    <td class="major_text" align="center">
    <br/> 
    <span id="verbatim" class="sender"> Alexander</span>
    </td> 
   </tr> 
   <tr> 
   <td>
    </td> 
    </tr> 
   <tr> 
   <td class="newline"> 
  </td>
</div>
...

我運行的代碼：

$dom = new domDocument($html);
$xpath = new domXPath($dom);
$nodes = $xpath->query('//span[@id="verbatim"]');
echo $nodes->item(0)->nodeValue;

問題是我不斷為$nodes->item(0)->nodeValue獲取NULL ，我不確定如何檢查此domElement。

當然，我需要Alexander價值觀

Answer 1

您只需實例化DOMDocument然后使用->loadHTML()來實際加載HTML標記：

$dom = new domDocument();
libxml_use_internal_errors(true);
$dom->loadHTML($html); // this line is important
$xpath = new domXPath($dom);
$nodes = $xpath->query('//span[@id="verbatim"]');
echo $nodes->item(0)->nodeValue;

樣本輸出

->evaluate()也將起作用：

echo $xpath->evaluate('string(//span[@id="verbatim"])');