裹在PHP H3標籤集合與DOM文檔之間的所有HTML標籤

Question

我有一個跟進問題，我的問題已經回答了@Jack： Wrap segments of HTML with divs (and generate table of contents from HTML-tags) with PHP

我一直在嘗試一些功能添加到上面的答案，以獲得以下結果。

這是我現在的HTML：

<h3>Subtitle</h3> 
<p>This is a paragraph</p> 
<p>This is another paragraph</p> 
<h3>Another subtile<h3> 
<p>Yet another paragraph</p> 

這是我想什麼來實現：

<h3 class="current">Subtitle</h3> 
<div class="ac_pane" style="display:block;"> 
    <p>This is a paragraph</p> 
    <p>This is another paragraph</p> 
</div> 
<h3>Another subtitle</h3> 
<div class="ac_pane"> 
    <p>Yet another paragraph</p> 
</div> 

我一直在試圖修改代碼上面的例子，但可以不知道：

foreach ($d->getElementsByTagName('h3') as $h3) { 
    $ac_pane_nodes = array($h3); 
    for ($next = $h3->nextSibling; $next && $next->nodeName != 'h3'; $next = $next->nextSibling) { 
     $ac_pane_nodes[] = $next; 
    } 
    $ac_pane = $d->createElement('div'); 
    $ac_pane->setAttribute('class', 'ac_pane'); 
    // Here I'm trying to wrap all tags between h3-sets, but am failing! 
      $h3->parentNode->appendChild($ac_pane, $h3); 
    foreach ($ac_pane_nodes as $node) { 
     $ac_pane->appendChild($node); 
    } 
} 

請注意，class="current"的第一個h3設置，並增加style="display:block;"到第一個div.ac_pane是可選的，但將非常感謝！

任何人都可以請快速幫忙嗎？提前致謝。

Answer 1

按照要求，這是一個工作版本。 IMO XSLT仍然是最適合這類問題的解決方案（實際上將一些XML轉換爲其他XML），但我不得不承認用常規代碼進行分組要容易得多！

我最終擴展了DOM API，只是爲了在DOMElement上添加實用工具insertAfter。它本來可以做，沒有它，但它的整潔：

更新到WRAP DIV周圍的所有標籤的要求，在評論

<?php 

class DOMDocumentExtended extends DOMDocument { 
    public function __construct($version = "1.0", $encoding = "UTF-8") { 
     parent::__construct($version, $encoding); 
     $this->registerNodeClass("DOMElement", "DOMElementExtended"); 
    } 
} 

class DOMElementExtended extends DOMElement { 
    public function insertAfter($targetNode) { 
     if ($targetNode->nextSibling) { 
      $targetNode->parentNode->insertBefore($this, $targetNode->nextSibling); 
     } else { 
      $targetNode->parentNode->appendChild($this); 
     } 
    } 

    public function wrapAround(DOMNodeList $nodeList) { 
     while (($node = $nodeList->item(0)) !== NULL) { 
      $this->appendChild($node); 
     } 
    } 
} 

$doc = new DOMDocumentExtended(); 
$doc->loadHTML(
    "<h3>Subtitle</h3> 
    <p>This is a paragraph</p> 
    <p>This is another paragraph</p> 
    <h3>Another subtile</h3> 
    <p>Yet another paragraph</p>" 
); 

// Grab a nodelist of all h3 tags 
$nodeList = $doc->getElementsByTagName("h3"); 

// Iterate over each of these h3 nodes 
foreach ($nodeList as $index => $h3) { 

    // Special handling for first h3 
    if ($index === 0) { 
     $h3->setAttribute("class", "current"); 
    } 

    // Create a div node that we'll use as our wrapper 
    $div = $doc->createElement("div"); 
    $div->setAttribute("class", "ac_pane"); 

    // Special handling for first div wrapper 
    if ($index === 0) { 
     $div->setAttribute("style", "display:block;"); 
    } 

    // Move next siblings of h3 until we hit another h3 
    while ($h3->nextSibling && $h3->nextSibling->localName !== "h3") { 
     $div->appendChild($h3->nextSibling); 
    } 

    // Add the div node right after the h3 
    $div->insertAfter($h3); 
} 

// UPDATE: wrap all child nodes of body in a div 
$div = $doc->createElement("div"); 
$body = $doc->getElementsByTagName("body")->item(0); 
$div->wrapAround($body->childNodes); 
$body->appendChild($div); 

echo $doc->saveHTML(); 

注意loadHTML將新增DOCTYPE，html和身體節點。 They can be stripped out if needed。