Return X values where an ID number doesnt matter

Posted on 16th Feb 2014 07:03 pm by admin

Well as for subject heading, thats the best i could think of.

Currently im having a problem with a rather old piece of script i had written for a guestbook.
The guestbook itself relies completely on the `id` field of the table to show the posts.
But if a post is deleted, then it screws up the pagination of the posts such that if you were to click "next page" the same results as the last page would show.

The query:
Line number On/Off | Expand/Contract$set = $numAllResults-$offset+1;SELECT * FROM `posts` WHERE `id` <= '$set' ORDER BY `id` DESC

This query works wonders if every entry in the table is only incremented by 1, but breaks when an entry of 'X' does not exist. ie. it skips post 'X' but also shows older posts based on the newest entry. As i know this isnt clear, let me clear it up with an example:
Line number On/Off | Expand/Contracttable - `posts``id`, `name`, `post`1,'Joe','Hi there'2,'Johanna','Love the guest book'3,'Jeff','Great stuff'4,'James','Could have more stuff'8,'John','Excellent!'9,'Joel','Not bad'

As you can see, there are 3 entries missing because they were deleted.
As it stands, there should be 2 pages in the guestbook because there are more than 5 entries.
However, the first page will show entries:
9,8,4,3,2.
The second page:
8,4,3,2,1

Now in this example, the problem isnt too huge, although when i have say 20 entries with half deleted, it will show the same posts for about 4 pages, and then change after the $set is lower than the older posts.

Yes i am posting my code, but, this was written over a year ago now, so i know i am breaking some of my own today's standards for programming Im just looking for a fix so that when items are deleted it will still show everything properly.

Line number On/Off | Expand/Contract<?phpinclude_once("include/connect.php");$guestbookconnect = connect();mysql_select_db("alexast_db",$guestbookconnect);$offset = $_GET['p'];if(!$_GET['p']){$offset = 0;}if($offset < 0){print "<script>window.location = 'guestbook.php';</script>";}$results = 5; //display number of results per page.$currentresults = 0; $getAllPostsSQL = "SELECT * FROM `posts` ORDER BY `id` DESC";$getAllPostsQuery = mysql_query($getAllPostsSQL, $guestbookconnect) or die(mysql_error($guestbookconnect));$numAllResults = mysql_num_rows($getAllPostsQuery); $set = $numAllResults-$offset+1;$getPostsSQL = "SELECT * FROM `posts` WHERE `id` <= '$set' ORDER BY `id` DESC";$getPostsQuery = mysql_query($getPostsSQL, $guestbookconnect) or die(mysql_error($guestbookconnect));$numResults = mysql_num_rows($getPostsQuery); while($getPostsResult = mysql_fetch_assoc($getPostsQuery)){$currentresults++; if($currentresults <= $results){?> <div class="guestbook_frame"> <div class="guestbook_box1"> <div id="style_name"><?php print $getPostsResult['name']; ?></div> </div> <div class="guestbook_box2"> <div id="style_date"><?php print $getPostsResult['date']; ?></div> </div> <div class="guestbook_box3"> </div> <div class="guestbook_box4"> <div id="style_content"><?php print $getPostsResult['content']; ?></div> </div> </div><?php }}mysql_close($guestbookconnect);?>

Your Answer:

Login to answer

Other forums

Email to a friend script problems
I have this send-to-a-friend script with 2 issues:


1) When you open the form popup on a p

Sendmail.php - heading error following check_input
Hi,

I would greatly appreciate some help? I am brand new to PHP and have been searching and e

How to display objects in a row
I have 7 codes that i want to display in a row one next to another.
The first is {$ads->ad

Exporting new records
Trying to figure out the best way to set this up.

People register my site.

Their prof

Last character removed
I have created a string from an array. I have inserted commas from my form values. I am trying to re

Pipe email to PHP - get mail adress from MySQL - send?
Hi all,

this is the challenge:

1) Our faculty at the college where I'm employed includ

login box shows up again after logging in 2nd login works
Hello,

I am having trouble on my site Lockerz.rack111.com where when you login the login box

How would I protect......
I have a from, actually, a good amount of forms. How can I make it so you can't type the characters:

BackButton Behaviour in AJAX
I have an ASPX Page AJAX Enabled!The page has a gridView and a DDL for filtering on it. The Gridview

Creation of Raw Exposure manually
SAP Gurus

I am creating Raw Exposure ( Hedge management ) thru T Code TEM10 with followin