How to extract html comments and all html contained by node?
Comment nodes should be easy to find in XPath with the comment() test, analogous to the text() test:
$comments = $xpath->query('//comment()'); // or another path, as you preferThey are standard nodes: here is the manual entry for the DOMComment class.
To your other question, it's a bit trickier. The simplest way is to use saveXML() with its optional $node argument:
$html = $dom->saveXML($el); // $el should be the element you want to get // the HTML for
For the HTML comments a fast method is:
function getComments ($html) { $rcomments = array(); $comments = array(); if (preg_match_all('#<\!--(.*?)-->#is', $html, $rcomments)) { foreach ($rcomments as $c) { $comments[] = $c[1]; } return $comments; } else { // No comments matchs return null; } }