pagination and row numbering

I wanna print a incresing number with each post. Like every forum has this.

I currently use this:

$i = 0; while ($post = mysql_fetch_assoc($rs)): $i++;

Lets say i print 5 post per page

This is what happens:

#1 First post
#2 2nd post
#3 3rd post
#4 4th post
#5 5th post

Then you go to page to 2

#1 6th post
#2 7th post
#3 8th post
#4 9th post
#5 10th post

I dont want that, I want it to keep increse highest number from first page

The sql:

SELECT u.group_id, u.username, u.title, p.poster, p开发者_如何学Go.message, p.thread_id, g.g_title, g.g_user_title FROM posts AS p 
        INNER JOIN users AS u ON u.id = p.poster 
        INNER JOIN groups AS g ON g.g_id = u.group_id
        WHERE p.thread_id = $id
        LIMIT $startIndex, $perPage

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You must have a variable identifying which page you're on. Multiply the page number by the number of elements per page. Voila, the unique ID of the first element of page N.

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Instead of printing $row print ($row + ($page * $pagesize))

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you need to take the page number into account. if you start numbering your pages with 0 you need to start counting at $currentPageNumber * $itemsPerPage

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if ($page == 1) {
  $ex_page = 0;
} else {
  $ex_page = $page;
}

$big_post_number = $row_num + $ex_page * $items_per_page;