Solved

how to avoid re-posted data

Posted on 2007-03-26
3
178 Views
Last Modified: 2008-02-01
Hi
I have noticed that if the user clicks the back button (warning box opens about re-posted data) the data is inserted again into mysql.
I need to avoid this happening. The page is posted to itself and stops when the uploaded data is succesfully loaded into mysql, it then offers a number of links to the user, clicking the back button is one I want to avoid. I have thought of using HTTP_REFERRER to check the page it has come from and header("Cache-Control: no-cache, must-revalidate"); to clear the cache.
I would like to know what an expert would do
Many thanks
0
Comment
Question by:TonyHull
3 Comments
 
LVL 6

Accepted Solution

by:
deresh earned 180 total points
ID: 18791394
you could do a unconditional redirect after you store your data from POST into database. that should reset post data.
0
 
LVL 17

Assisted Solution

by:psimation
psimation earned 160 total points
ID: 18791522
or you could create a session variable that holds a "page loaded" value. For instance, before you write, you have a check to see if the session variable contains something, if it does, you don't write to db, if it's empty, you write to db, plus put a value in session var.

0
 
LVL 4

Assisted Solution

by:Mr-Ene
Mr-Ene earned 160 total points
ID: 18814628
before every page generation, generate a random hash. place in in a hidden input, and store it, and the previous value in session.

check if they match after post.
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Since pre-biblical times, humans have sought ways to keep secrets, and share the secrets selectively.  This article explores the ways PHP can be used to hide and encrypt information.
Introduction This article is intended for those who are new to PHP error handling (https://www.experts-exchange.com/articles/11769/And-by-the-way-I-am-New-to-PHP.html).  It addresses one of the most common problems that plague beginning PHP develop…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.
The viewer will learn how to create a basic form using some HTML5 and PHP for later processing. Set up your basic HTML file. Open your form tag and set the method and action attributes.: (CODE) Set up your first few inputs one for the name and …

807 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question