PHP和XPath查询

Question

我需要剥离HTML文档中的一些值和一些原始HTML。我想过使用XPath，但我无法让我的查询工作。

这里是我想达到的目标：

<div class="unit-id"> 
    <div class="title"> 
     some title-1 
    </div> 

    <div class="another-class"> 
     another class 
    </div> 
    <p>segwegw1<p> 
    <p>segwegw1<p> 
    <p>segwegw1<p> 
    <p>segwegw1<p> 
    <ul> 
    <li>jfjfj</li> 
    <li>jfjfj</li> 
    <li>jfjfj</li> 
    </ul> 
</div> 


<div class="unit-id"> 
    <div class="title"> 
     some title-2 
    </div> 
    <div class="another-class"> 
     some other class 
    </div> 
    <p>segwegw2<p> 
    <p>segwegw2<p> 
    <p>segwegw2<p> 
    <p>segwegw2<p> 
</div> 


<div class="unit-id"> 
    <div class="title"> 
     some title-3 
    </div> 
    <div class="some-other-class"> 
     some other data 
    </div> 
    <p>segwegw3<p> 
    <p>segwegw3<p> 
    <p>segwegw3<p> 
    <p>segwegw3<p> 
</div> 

所以我想查询通过每个div一个单位ID级别迭代和带班的title返回divs的价值， HTML的其余部分，除了divs以外，还有p标签和ul这些特殊的单元ID分类为div，然后进行下一次迭代。

这可能吗？你能否给我提供一个如何编写这个查询的例子？有没有更好的方法来做到这一点？

Answer 1

此代码有点像你在找什么：

function get_content($data){ 
    $doc = new DOMDocument(); 
    //load HTML string into document object 
    if (! @$doc->loadHTML($data)){ 
     return FALSE; 
    } 
    //create XPath object using the document object as the parameter 
    $xpath = new DOMXPath($doc); 
    $query = "//div[@class='unit-id']"; 
    //XPath queries return a NodeList 
    $res = $xpath->query($query); 
    $out = array(); 
    foreach ($res as $key => $node){ 
     //subquery 
     $sub = $xpath->query('.//div[@class="title"]', $node); 
     $out[$key]['title'] = trim($sub->item(0)->nodeValue); 
     foreach ($node->getElementsByTagName('p') as $key2 => $value){ 
      $out[$key]['par'][$key2] = $value->nodeValue; 
     } 
     foreach ($node->getElementsByTagName('li') as $key2 => $value){ 
      $out[$key]['list'][$key2] = $value->nodeValue; 
     } 
    } 
    return $out; 
} 

请注意，你有你的HTML错误。您正在关闭段落标记应该有尾部斜杠</p>。

下面是输出：

array 
    0 => 
    array 
     'title' => string 'some title-1' (length=12) 
     'par' => 
     array 
      0 => string 'segwegw1' (length=8) 
      1 => string 'segwegw1' (length=8) 
      2 => string 'segwegw1' (length=8) 
      3 => string 'segwegw1' (length=8) 
     'list' => 
     array 
      0 => string 'jfjfj' (length=5) 
      1 => string 'jfjfj' (length=5) 
      2 => string 'jfjfj' (length=5) 
    1 => 
    array 
     'title' => string 'some title-2' (length=12) 
     'par' => 
     array 
      0 => string 'segwegw2' (length=8) 
      1 => string 'segwegw2' (length=8) 
      2 => string 'segwegw2' (length=8) 
      3 => string 'segwegw2' (length=8)