Question

I need to solve next problem:

I need the most optomized solution for count new time comments in blogposts.

My own solution is:

create one more tbl, where save blogpost_id, lastview_num_comment what updated with every review of post, and count_num_comment what == blog_post.num_comments

example:

<?php 
function post($id){
   if($id && $id!=0){
      $sql = "SELECT `num_comments` FROM `blog_post` WHERE `id`=".quote_smart($id);
      $res=mysql_query($sql);
      $rw=mysql_fetch_array($res);
      $sql = "UPDATE `new_comments` SET last_view_numcom=".$rw['num_comments'];
      if(mysql_query($sql)){
         return 1;
      }else $this->error("database connect failed");
   }else redirect("");
}
?>

but with everyone adding comment i need to use update query what aren’t the best solution

Answer 1

I don’t think there is better solution if you need real time number. Otherwise you could update this every x minutes by cron.

However you can improve this code by reducing it to one mysql_query run:

$sql = "UPDATEnew_commentsSET last_view_numcom = (SELECTnum_commentsFROMblog_postWHEREid=".quote_smart($id).")";