PHP DOM functuon to creat Div ID from HTML5 Elements - php

Question

I am using the following function to replace HTML5 elements with Div ID.
<?php function nonHTML5 ($content){
$dom = new DOMDocument;
// Hide HTML5 element errors
libxml_use_internal_errors(true);
$dom->loadHTML($content);
libxml_clear_errors();
$xp = new DOMXPath($dom);
// Bring elements into array
$elements = $xp->query('//*[self::header| self::footer ]
[not(ancestor::pre) and not(ancestor::code)]');
// Loop through
foreach($elements as $element){
// Replace with 'div' tag
$newElement = $dom->createElement('div');
while($element->childNodes->length){
// Keepup with the child nodes
$childElement = $element->childNodes->item(0);
$newElement->appendChild($dom->importNode($childElement, true));
}
while($element->attributes->length){
// Mailtain the length
$attributeNode = $element->attributes->item(0);
$newElement->setAttributeNode($dom->importNode($attributeNode));
}
$element->parentNode->replaceChild($newElement, $element);
}
$content = $dom->saveXML($dom->documentElement);
return $content;
} ?>
I know we can use HTMLShiv but I want to do this primarily for Old browsers with JavaScript disabled.
My Challenge:
I am not able to add an id =" " to it. For example.....
<header>
<h1>I am the header</h1>
</header>
Should become
<div id ="header">
<h1>I am the header</h1>
</div>
I tried doing......
$newElement = $dom->createElement('div id ="' . $element . '"');
but did not work.
My question
What should be the correct code?
Please Note: I am not a PHP expert hence please be a little descriptive in your answers / comments.

Answer 1

Here is how you can do it:
NOTE : I have added comments for more clarification that what is happening in exactly each statement of the code.
CREATING AN HTML ELEMENT WITH ATTRIBUTE USING DOM :
<?php
// Initiate a new DOMDocument
$dom = new DOMDocument();
// Create an element
$div = $dom->createElement("div","HERE DIV CONTENTS");
// Create an attribute i.e id
$divAttr = $dom->createAttribute('id');
// Assign value to your attribute i.e id="value"
$divAttr->value = 'This is an id';
// Add your attribute (id) to your element (div)
$div->appendChild($divAttr);
// Add your element (div) to DOM
$dom->appendChild($div);
// Print your DOM HERE
echo $dom->saveHTML();
?>
CODE OUTPUT :
<div id="This is an id">HERE DIV CONTENTS</div>