Solved

posting form data

Posted on 2016-10-26
3
37 Views
Last Modified: 2016-10-26
I use PHP and mysql
how can I be sure that if my web form is actually posted from my own server?

I think anyone can send a data to my action page from a different server?

I use https by the way.
0
Comment
Question by:Braveheartli
  • 2
3 Comments
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 41860105
anyone can send a data to my action page from a different server?
Yes, that is one of the built-in risks of the HTTP protocol.  You can't prevent it, but you can make it harmless.

You may consider using a "form token."
https://www.experts-exchange.com/articles/28802/Improved-Form-Tokens-to-Guard-Against-CSRF-and-Screen-Scrapers.html

You can check HTTP_REFERER (It's all explained in the article).  You can also check the input controls.  You will find their names in the array keys of $_POST.  If any are missing or there are any extras, just discard the request.

If you need more protection, consider a CAPTCHA test.
https://www.experts-exchange.com/articles/9849/Making-CAPTCHA-Friendlier-with-Simple-Number-Tests-or-PHP-Image-Manipulation.html
0
 
LVL 1

Author Closing Comment

by:Braveheartli
ID: 41860107
thank you
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 41860122
You're welcome!  Glad to help, ~Ray
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Foreword (July, 2015) Since I first wrote this article, years ago, a great many more people have begun using the internet.  They are coming online from every part of the globe, learning, reading, shopping and spending money at an ever-increasing ra…
Part of the Global Positioning System A geocode (https://developers.google.com/maps/documentation/geocoding/) is the major subset of a GPS coordinate (http://en.wikipedia.org/wiki/Global_Positioning_System), the other parts being the altitude and t…
The viewer will learn how to dynamically set the form action using jQuery.
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 …

813 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now