php – 如何使用DOMDocumentFragment移动内部内容？

我有一个可怕的算法,“删除节点”,将其内部内容移动到其父节点(见下文)……但我认为有可能使用 DOMDocumentFragment(而不是使用saveXML / loadXML)开发更好的算法.

下面的算法灵感来自renameNode().

/**
  * Move the content of the $from node to its parent node.
  * Conditions: parent not a document root,$from not a text node.  
  * @param DOMElement $from to be removed,preserving its contents.
  * @return true if changed,false if not.
  */
 function moveInner($from) {
     $to = $from->parentNode;
     if ($from->nodeType==1 && $to->parentNode->nodeType==1) {     
        // Scans $from,and record information:
        $lst = array(); // to avoid "scan bugs" of DomNodeList iterator
        foreach ($to->childNodes as $e)
           $lst[] =  array($e);
        for($i=0; $i<count($lst); $i++)
          if ($lst[$i][0]->nodeType==1 && $from->isSameNode($lst[$i][0])) {  
            $lst[$i][1] = array();
            foreach ($lst[$i][0]->childNodes as $e)
                $lst[$i][1][] = $e;
          }

        // Build $newTo (rebuilds the parent node):
        $newTo = $from->ownerDocument->createElement($to->nodeName);
        foreach ($to->attributes as $a) {
        $newTo->setAttribute($a->nodeName,$a->nodeValue);
        }
        foreach ($lst as $r) {
        if (count($r)==1)
            $newTo->appendChild($r[0]);
        else foreach ($r[1] as $e)
            $newTo->appendChild($e);
        }

        // Replaces it:
        $to->parentNode->replaceChild($newTo,$to);
        return true;

    } else
        return false;
 }

例

INPUT

<html id="root">
<p id="p1"><i>Title</i></p>
<p id="p2"><b id="b1">Rosangela<sup>1</sup>,Maria<sup>2</sup></b>,<b>Eduardo<sup>4</sup></b>
</p>
</html>

moveInner的输出($dom-> getElementById(‘p1’))

... <p id="p1">Title</p> ...

moveInner的输出($dom-> getElementById(‘b1’))

... <p id="p2">Rosangela<sup>1</sup>,Maria<sup>2</sup>,<b>Eduardo<sup>4</sup></b>
    </p> ...

首次使用后,moveInner($dom-> getElementById(‘root’))或moveInner($dom-> getElementById(‘p1’))没有变化.

PS：就像一个“TRIM TAG”功能.

@H_404_24@

/** * Move the content of the $from node to its parent node. * * @param DOMElement $from to be removed,preserving its contents. * @return DOMElement the element removed (w/o it's former children) * @throws InvalidArgumentException in case there is no parent element */ function moveInner(DOMElement $from) { if (!$from->parentNode instanceof DOMElement) { throw new InvalidArgumentException( 'DOMElement does not have a parent DOMElement node.' ); } /** @var DOMNode[] $children */ $children = iterator_to_array($from->childNodes); foreach ($children as $child) { $from->parentNode->insertBefore($child,$from); } return $from->parentNode->removeChild($from); }

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html id="root"><body>Title 2 Rosangela1,Eduardo4 </body></html> Removed:

php – 如何使用DOMDocumentFragment移动内部内容？

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