Replace Tag in HTML with DOMDocument
dom, php
Solution
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);
}
Problem
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 to change/replace an existing HTML tag w/ a new one) says. This should convert pre tags into div tags but it gives "Fatal error: Uncaught exception 'DOMException' with message 'Not Found Error'." ``` <?php $contents = <<<STR <pre>hi</pre> <pre>hello</pre> <pre>bye</pre> STR; $dom = new DOMDocument; @$dom->loadHTML($contents); foreach( $dom->getElementsByTagName("pre") as $nodePre ) { $nodeDiv = $dom->createElement("div", $nodePre->nodeValue); $dom->replaceChild($nodeDiv, $nodePre); } echo $dom->saveHTML(); ?> ``` [Edit] While I'm trying to iterate the node object backwards, I get this error, 'Notice: Trying to get property of non-object...' ``` <?php $contents = <<<STR <pre>hi</pre> <pre>hello</pre> <pre>bye</pre> STR; $dom = new DOMDocument; @$dom->loadHTML($contents); $domPre = $dom->getElementsByTagName('pre'); $length = $domPre->length; For ($i = $length; $i > -1 ; $i--) { $nodePre = $domPre->item($i); echo $nodePre->nodeValue . '<br />'; // $nodeDiv = $dom->createElement("div", $nodePre->nodeValue); // $dom->replaceChild($nodeDiv, $nodePre); } // echo $dom->saveHTML(); ?> ``` [Edit] Okey, solved. Since the answered code has some error I post the solution here. Thanks all. Solution: ``` <?php $contents = <<<STR <pre>hi</pre> <pre>hello</pre> <pre>bye</pre> STR; $dom = new DOMDocument; @$dom->loadHTML($contents); $domPre = $dom->getElementsByTagName('pre'); $length = $domPre->length; For ($i = $length - 1; $i > -1 ; $i--) { $nodePre = $domPre->item($i); $nodeDiv = $dom->createElement("div", $nodePre->nodeValue); $nodePre->parentNode->replaceChild($nodeDiv, $nodePre); } echo $dom->saveHTML(); ?> ```