PHP和XPath查詢

Question

我需要剝離HTML文檔中的一些值和一些原始HTML。我想過使用XPath，但我無法讓我的查詢工作。

這裏是我想達到的目標：

<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> 

所以我想查詢通過每個div一個單位ID級別迭代和帶班的title返回divs的價值， HTML的其餘部分，除了divs以外，還有p標籤和ul這些特殊的單元ID分類爲div，然後進行下一次迭代。

這可能嗎？你能否給我提供一個如何編寫這個查詢的例子？有沒有更好的方法來做到這一點？

Answer 1

此代碼有點像你在找什麼：

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; 
} 

請注意，你有你的HTML錯誤。您正在關閉段落標記應該有尾部斜槓</p>。

下面是輸出：

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)