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

Deleting Partners on the Customer Master.
Does SAP handle removing the Partner from Open Sales Orders when a Partner is deleted in the Custome

Display certain image depending on time of year
Hi, I am new to these forums and would really appreciate some advice on a piece of coding I have don

how to easy edit text, with box? Help.
Hi.
I have a little problem. I'm doing a webpage for my aunt and I would like to make it as easy

Checking if variable is 0 as opposed to NULL/Empty...
I'm trying to write some code that will retrieve a user's access level from my database and if it do

SAP Logon Failed
I tried to login to SAP through MMC.

When i click start and give password.

it

Backflush
I am looking for a report in SAP that would give me a list of all parts that are populated with a ba

Guixt issue
Hello all,

We are experiencing the following problem with Guixt:

Some transact

$_POST
Hi, I have 2 seperate php files, and i want my $_POSt["fname"] To go into both of them, Fo

how do I show what a user have selected from a checkbox?
From my code below, how would i show which check boxes have been checked and which radio buttons sel

Disabling SAP menu
How do I disable SAP menu for all the users and just restrict them to User Menu in SAP ECC 6.0?