在html中獲取子節點的值

Question

我想從html中獲取子節點的值。

我想什麼： -

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

      } 
    } 

我能夠得到所有的childNodes值，即使childtag沒有值 我得到一個空字符串。

如果標籤有合適的值，有沒有辦法獲取值？

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> 

我想要的輸出： -

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

什麼我得到： -

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

經過一番測試，這應該爲你想完成什麼工作：

→ 1日編輯：該解決方案佔通過內部標識多個子節點循環。

→ 2nd編輯：此解決方案說明了您不希望返回的標籤/值。

→ 第3編輯：瞭解原始問題的細節和真正無關的更新問題。

$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 />"; 
    } 
} 

上述腳本的輸出是：

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

Answer 2

檢查echo之前的值？

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