Question

A simple one for all your PHP guys out there.
I have a string which represents a portion of HTML. It looks something like this:

<p>blablabla.....</p>
<p>blablabla.....</p>
<p>blablabla.....</p>
<p>blablabla.....</p>
<h3>hello</h3>
<p>blablabla.....</p>
<p>blablabla.....</p> etc etc

What I would like to do is loop over the nodes applying a class to each, until I hit the h3.

Thanks,

EDIT
I have so far tried:

$dochtml = new DOMDocument();
$dochtml->loadHTML($strhtml); 

foreach ($dochtml->childNodes as $node)
{

    if($node->tagName == "p") {
    $node->setAttribute('class', 'someclass');
    } else {
    break;
}
}

Which simply doesn’t work.

The HTML fragment is from a database and represents the editable portion of a page within a CMS.

Answer 1

Well:

<?php

$string = explode( '<h3>', $string );
$string[0] = str_replace( '<p>', '<p class="foo">', $string[0] );
$string = implode( '<h3>', $string );