DOM manipulation in PHP

<div>This is some <b>text

$d = new DOMDocument;
$d->loadHTML('<div>This is some <b>text');
$d->saveHTML();

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
  <body>
    <div>This is some <b>text</b></div>
  </body>
</html>