Hello everyone,

Im trying to use the DOM in PHP to do a pretty specific job and Ive got no luck so far, the objective is to take a string of HTML from a Wordpress blog post (from the DB, this is a wordpress plugin). And then out of that HTML replace <div id="do_not_edit">old content</div>" with <div id="do_not_edit">new content</div>" in its place. Saving anything above and below that div in its structure.

Then save the HTML back into the DB, should be simple really, I have read that a regex wouldnt be the right way to go here so Ive turned to the DOM instead.

The problem is I just cant get it to work, cant extract the div or anything.

Help me!!

UPDATE

The HTML coming out of the wordpress table looks like:

Congratulations on finding us here on the world wide web, we are on a  mission to create a website that will show off your culinary skills  better than any other website does.

<div id="do_not_edit">blah blah</div>
We want this website to be fun and  easy to use, we strive for simple elegance and incredible functionality.We aim to provide a 'complete package'. By this we want to create a  website where people can meet, share ideas and help each other out.

After several different (incorrect) workings all Ive got below is:

$content = ($wpdb->get_var( "SELECT `post_content` FROM $wpdb->posts WHERE ID = {$article[post_id]}" ));        

$doc = new DOMDocument();
$doc->validateOnParse = true; 
$doc->loadHTMLFile($content);
$element = $doc->getElementById('do_not_edit');
echo $element;