在html中获取子节点的值

Question

我想从html中获取子节点的值。

我想什么： -

$data = $dom->getElementById($identifier); 
$node = $data->childNodes; 
foreach($node as $node) 
    { 
      echo $node->nodeName; 
      echo $node->nodeValue; 

      } 
    } 

我能够得到所有的childNodes值，即使childtag没有值 我得到一个空字符串。

如果标签有合适的值，有没有办法获取值？

更新： -

我htmldata： -

<div id="myid"> //I give this id as input 
<h1> Some data 1</h1> 
<script type=".."> google adsense details </script> 
<p class="some class"> </p> 
<div class="some class1"></div> 
<h2>data2</h2> 
<p>SOme more data...blah blah..</p> 
</div> 

我想要的输出： -

Some data 1 
    data2 
    SOme more data...blah blah.. 

什么我得到： -

Some data 1 
    googleadsense details//i am getting values inside script as well 
    //blanc data which includes many spaces of tag p 
    //blanc data which includes many spaces of tag div 
    data2 
    SOme more data...blah blah.. 

Answer 1

经过一番测试，这应该为你想完成什么工作：

→ 1日编辑：该解决方案占通过内部标识多个子节点循环。

→ 2nd编辑：此解决方案说明了您不希望返回的标签/值。

→ 第3编辑：了解原始问题的细节和真正无关的更新问题。

$dom = new DOMDocument(); 
$html = '<div id="myid"> //I give this id as input<h1> Some data 1</h1><script type=".."> google adsense details </script><p class="some class"></p><div class="some class1"></div><h2>data2</h2><p>SOme more data...blah blah..</p></div>'; 
$dom->loadHTML($html); 

$identifier = "myid"; 
$id_nodes = $dom->getElementById($identifier); 

foreach($id_nodes->childNodes as $node) 
{ 
    // Blacklist for what you do not want in your output: 
    if($node->nodeName != "script" && $node->nodeName != "#text" && $node->nodeValue != '') { 
     echo $node->nodeValue . "<br />"; 
    } 
} 

上述脚本的输出是：

Some data 1 
data2 
SOme more data...blah blah.. 

Answer 2

检查echo之前的值？

foreach($data as $node) 
{ 
    if(strlen($node->nodeValue) > 0) 
{ 
    echo $node->nodeName; 
    echo $node->nodeValue; 
} 
}