How to extract html comments and all html contained by node?

Question

I\'m creating a little web app to help me manage and analyze the content of my websites, and cURL is my favorite new toy. I\'ve figured out how to extract info about all so

Answer 1

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;
     }

 }

Answer 2

for comments your looking for recursive regex. For instance, to get rid of html comments:

preg_replace('/<!--(?(?=<!--)(?R)|.)*?-->/s',$yourHTML);

to find them:

preg_match_all('/(<!--(?(?=<!--)(?R)|.)*?-->)/s',$yourHTML,$comments);

Answer 3

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 prefer

They 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

Answer 4

That Regex \s*<!--[\s\S]+?-->
Helps to you.

In regex Test