PHP倒数SQL行从总行减少到0

Question

I couldn't quite find what I was look for by googling or searching stackoverflow, so I'm just gonna ask it.

$reply_sql = mysqli_query($successconnect, "SELECT * FROM replies WHERE reply_thread = '" . $reply_thread_id . "' ORDER BY reply_date DESC LIMIT $cur, $max");
$numbb = ((20 - (20 * $page)) * -1);
while($reply_row = mysqli_fetch_assoc($reply_sql)) {
$numbb++;

This will result in each reply row counting from 1 up to the total amount of rows. That is all fine if I want my replies to order ASC.

I want it to go from total amount of rows down to 0. I imagine this is all math, but I'm really bad at it. And maybe there's an easier way to do this.

$numbb--;

This I know about, but I tried many variations of $numbb and couldn't quite figure out a way to make for instance:

23 (Total Replies) 1 (Page 1) makes it count from 23 down to 3
23 (Total Replies) 2 (Page 2) makes it count from 3 down to 1

Answer 1

It took me a while of trying different combinations, but I had to move around the original code with 23 or replycount in mind to get the result I need.

$numbb = ((($replycount + 20) - (20 * $page)) + 1);
while($reply_row = mysqli_fetch_assoc($reply_sql)) {
$numbb--;

23 + 20 = 43 - 20 * 1 = 23 + 1 = 24 which $numbb shows as 23 with the first row. And then 23 + 20 = 43 - 20 * 2 = 3 + 1 = 4 which shows as 3 on page 2.