Pagination in PHP (paginate comments)

Question

I watched video tutorial about pagination in PHP. Author used 4th version of PHP in his tutorial. Now, I want to paginate my comments page. I used code which I learned in tutorial. Code like this:

$limit = 10;
$page = $_GET['page'];
if(($page='') or !is_numeric($page)){
    $page = 1;
}

$total_posts = mysql_num_rows(mysql_query("SELECT * FROM comments"));
$total_pages = ceil($total_posts / $limit);
$start = ($page-1)*$limit;

$query = mysql_query("SELECT * FROM comments ORDER BY likes DESC LIMIT $start,$limit");
while($write = mysql_fetch_array($query)){
    $id      = $write['id'];
    $comment = $write['comment'];
    $likes   = $write['likes'];

    echo $id . ' ' . $comment . ' ' . $likes . '<br>' ;
}

But, when I paginate pages, the content of page doesn't change. For example, the comments which in "comments.php?page=1" is the same as "comments.php?page=2".

Does it depend on version of PHP? (because, this code worked in video tutorial) Please, help me to find where is problem.

Answer 1

or works much more differently from ||

Try using || instead

ALSO

You are setting $page = '' on every page load no matter what. so it is always page 1

if(($page='') or !is_numeric($page)){ //!!!ahhh
    $page   = 1;
}

Change that to:

if(($page == '') || !is_numeric($page)){
   $page = 1;
}