Extracting parts of an html page

simple but I have no clue

[bluemi]

This is most likely very easy to answer for php people but I have not much of a clue, if any, about php. Basically the situation is this: I have a website in html and now want to build a second, related, one. Certain portions of the text will be identical on both sites and are quite often updated. Now, how can I make changes in the text on the first site which then automatically shows up on the second one as well? I know, I can create templates and then use include for both sites, but as the first one is already existing I would rather like to extract partions of the text there with php.

As I have full control over both sites is there a way to mark certain paragraphs in the first site, like

<!-- start -->
text text
text text
<!-- end -->

and then capture everything bewteen <!-- start --> and <!-- end --> and include on the second site?

Would be most grateful for any replies. Thanks!

[Distel]

I'm unable to test this right now, but here's something that should work (although I'd go through the "trouble" of copy/pasting the relevant parts to separate PHP files and including them myself):

On the second page, which copies from the first one, place this where you want the info to be copied:

$fp = fopen("firstpage.php","r");
if(!feof($fp)){
$buffer = fgets($fp,5000);
$x = 0;
if($buffer == "<!-- start of chunk of text -->"){$x = 1;}
if($buffer == "<!-- end of chunk of text -->"){$x = 0;}
if($x == 1){
echo $buffer;
}
}
fclose($fp);

[Distel]

Sorry, you should change that "if" in a "while":

while(!feof($fp)){

Also, I added some whitespace to make my code more readable, but it was apparently removed by this forum's underlying code.