Dom appendChild strips trailing text from within a node

"Eric Wiener" <ewiener@xxxxxxxxxxxxxx> · Wed, 13 Jun 2007 10:09:47 -0700

I am trying to modify a node name and it mostly works, except that
appendChild seems to strip the text that FOLLOWS after a subnode.
Leading text and subnodes appear to be retained perfectly, just not text
trailing the subnode. I tried using cloneNode, but that discarded the
children even when I sent "true" as an argument.

$html='<div>div1 <b>bold1 <i>italic1<u>underline1</u></i> bold2</b>
div2<b>bold3</b> <u>underline</u></div>';

$dom = new DomDocument;

$dom->loadHTML($html);

$nodes = $dom->getElementsByTagName('b');

foreach ($nodes as $oldNode) {

    $newNode = $dom->createElement('strong');

        foreach($oldNode->childNodes as $thisOldNode) {

            if ($thisOldNode->nodeName == '#text') {

                $newNode->nodeValue .= $thisOldNode->nodeValue;

            } else {

                // ---- appendChild seems to cause the issue ---- //

                $newNode->appendChild($thisOldNode);

            }

        }

    $oldNode->parentNode->replaceChild($newNode, $oldNode);

}

//for debugging:

echo nl2br(htmlentities($html)) . '<hr />';

echo nl2br(htmlentities(str_replace(array('<body>', '</body>',
'</html>'), '', strstr($dom->saveXML(), '<body>'))));

/*

Should return:

<div>div1 <strong>bold1 <i>italic1<u>underline1</u></i> bold2</strong>
div2<b>bold3</b> <u>underline</u></div>

Instead returns:

<div>div1 <strong>bold1 <i>italic1<u>underline1</u></i></strong>
div2<b>bold3</b> <u>underline</u></div>

*/