Replace Tag in HTML with DOMDocument

Question

I\'m trying to edit html tags with DOMDocument::loadHTML in php. The html data is a part of html and not the whole page. I followed what this page (PHP - DOMDocument - need

Answer 1

Another way with paquettg/php-html-parser (didn't find the way to change name, so had to use hack with re-binding $this):

use PHPHtmlParser\Dom;
use PHPHtmlParser\Dom\HtmlNode;

$dom = new Dom;
$dom->load($text);
/** @var HtmlNode[] $tags */
foreach($dom->find('pre') as $tag) {
    $changeTag = function() {
        $this->name = 'div';
    };
    $changeTag->call($tag->tag);
};
echo (string)$dom;

Answer 2

The problem is the call to replaceChild(). Rather than

$dom->replaceChild($nodeDiv, $nodePre);

use

$nodePre->parentNode->replaceChild($nodeDiv, $nodePre);

update

Here is a working code. Seems there is some issue with replacing multiple nodes (more info here: http://php.net/manual/en/domnode.replacechild.php) so you'll have to use a regressive loop to replace the elements.

$contents = <<<STR
<pre>hi</pre>
<pre>hello</pre>
<pre>bye</pre>
STR;

$dom = new DOMDocument;
@$dom->loadHTML($contents);

$elements = $dom->getElementsByTagName("pre");
for ($i = $elements->length - 1; $i >= 0; $i --) {
    $nodePre = $elements->item($i);
    $nodeDiv = $dom->createElement("div", $nodePre->nodeValue);
    $nodePre->parentNode->replaceChild($nodeDiv, $nodePre);
}