PHP StackOverflow Clone

December 9, 2009

PHP StackOverflow Clone

By Anant Garg / PHP / 49 Responses

Qwench is a PHP/mySQL based StackOverflow clone.

Features
1. Allow users to post questions and answers
2. Points system similar to StackOverflow
3. Ability to post an article as a knowledge-base (for corporates)
4. Ability to lock site to registered users only
5. Clean CSS layout
6. Works in all major browsers

Demonstration
Launch Qwench – StackOverflow Clone Demo

Screenshot

Requirements
1. PHP 4+
2. mySQL

Getting Started
Download and follow the instructions in README.txt file

Download
Qwench is hosted at GitHub

License
Qwench licence can be found in the LICENSE.txt file.

Comments/Suggestions?
Do let me know your suggestions on how we can improve this code or any other features you would like to add.

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178 Words

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ed0t
Great application!
I was looking for something like this!
I read the license, but i want to ask you, it is possible to modify it to add some features?
- Anant Garg
  Yes, you can as long as you contribute those changes back to the product. (Very similar to the SMF license)
Markus Paul
Nice work, but you should update the DB Layout – above all indexes on foreign keys and may InnoDB if its possible.
- Anant Garg
  InnoDB won’t work for FULLTEXTSEARCH.
robert
Can I upvote this post 🙂
koen
PHP 4+ ?
Markus Paul
May you need FULLTEXT for your single search table – so you can use InnoDB for all the rest. Just an idea 😉
Jérôme
Did you plan to maintain this application ?
do you use CSV for development ?
I want to internationalize it (my langage : French) using gettext are you interested ?
John
What’s the chance of setting this project up on GitHub so we can make changes/merges and fix it up a bit.
There’s a few bugs I can see from the outset:
* Stripslashes
* Duplicate emails allowed (odd when it’s the login)
- Anant Garg
  I have now moved Qwench to GitHub:
  http://github.com/anantgarg/Qwench
Jérôme
I just uploaded a localize version of Qwench on github (i don’t kno how to make a branch in you github ?)
This where you can find my sources
http://github.com/jerome42/Qwench
I localize the application in french and english
i add localize.php and the directory locale
i also simplify the timeago.php
Michele
Is it multi languages?
berzniz
Great work! I was waiting for someone to try and make a StackOverflow clone.
The localization works good except for some strings that are not in _(string) format, so they can not be translated.
I also have a problem when posting comments. If it’s not in English, they show up with a wrong encoding.
Francisco Espinoza
Excellent clone. Currently CNProg use for a site of questions and answers I have. But the same is based on Django and Django Sucks. I like how you have implemented many functions, and I think I can make a another function that needs your CMS.
1. Notifications by email of new answers for each question.
2. RSS Feed. For all new questions and new comments for each question.
3. Profiles. Need to accumulate Karma, that’s what I like about StackOverflow. Czech these profiles: http://hasked.com/usuarios/8/samus/
4. Distinctions. This accompanied the Karma of course.
5. Tags & Categories.
I am very impressed with your work. I would probably contact you by email, to see if discussing a job. Contact me when you have spare time.
Eddie
Was wondering if you are going to add more options to the profile like capability to change avatars?
Eddie
It looks to me like the points calculation is off.
After the first activity, I see 2 points in the activities table but only 1 in the users table. when accepting an answer, I see 15 in the activities table and now there are 18 in the users table.
Can you explain that?
Jérôme
I just correct and add some localization problem on http://github.com/jerome42/Qwench
adwin
wow … that’s great … i am looking for this for my friend …
davitz38
Great script, is there any updates? is there any active forum or google group or …
Bobby Samai
Please visit and join the qwench community forum and help the further development of this great software. Join http://www.qwench.net and start posting topics, feature requests, tips and tricks etc…
Tim
You seem to have put alot of hard work into the development of quench… good stuff… the layout could use some work but this is manageable. Thanks heaps!
Tim
akshay
great work.I have seen your application woking great online .
But when i try to devlop it on my local pc i can only see home page.When i clink on ask/contribute i get a message OBJECT NOT FOUND (ERROR 404 ).
i GET SAME ERROR TO WHEN I CLINK ANY LINK ON THE HOME PAGE.
I have set define(‘BASE_DIR’,’/qwench’);
please help
gafeman
thanks a lot to share this, great work!
but i found a bug, when you want to vote one answer something crashes..
controllers/questions.php – line 477
replace:
var basePath = “/qwench/index.php”;
to:
var basePath = “$basePathNS”;
thanks again, regards from spain!
John
Amazing work! Not sure how long you took in coding this but its really clean…
I am a little confused about the license. Does it mean that if I modify this for my site (of course retaining all the Qwench copyrights), do I have to contribute back the entire source code?
XO
Very nice, clean and a solid alternative to forum applications out there. This definitely merits being a StackOverflow clone. I’ve checked out several clones and feel that this one has great potential. Heck, it may be production ready, I have not messed around with it other than checking out the demo. I will be check back from time to time.
Koen
What a beautifull (free?!) script! i like it. But when i install it i got 2 errors:
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/******/domains/******/public_html/qwench/controllers/questions.php on line 931
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/******/domains/******/public_html/qwench/controllers/questions.php on line 907
Could you please help me?
king del rosario
Warning: include(/home/content/n/o/y/noybook/html/controllers/index.php.php) [function.include]: failed to open stream: No such file or directory in /home/content/n/o/y/noybook/html/index.php on line 48
How do I solve this installation problem? Please help!
Warning: include() [function.include]: Failed opening ‘/home/content/n/o/y/noybook/html/controllers/index.php.php’ for inclusion (include_path=’.:/usr/local/php5/lib/php’) in /home/content/n/o/y/noybook/html/index.php on line 48
Warning: call_user_func(index) [function.call-user-func]: First argument is expected to be a valid callback in /home/content/n/o/y/noybook/html/index.php on line 52
Dave
I’m getting the same error on line 907 and 931. Is this project still active? And of so, how do I fix this? Perhaps a folder needs a different permission set for it
Amit
I really found your script very useful. People must participate its development. I am non-php developer. Once i start to work on it. I’ll surely contribute.
Tell me if there is any other version suggested by jerome42.
Please mention all reported bug which are rest to resolve. It’ll help other developers to work on it.
Amit
I faced err on 907 & 931 line when i directly run index.php instead of install.php
You are supposed to run instal.php once
Columbus Injury Lawyer
I’m still trying to learn PHP. I find online blogs such as yours to be very helpful. Thanks for the post.
Emiliano
I have a problem only in the index.php file (Notice: Undefined index: PATH_INFO in C:\Archivos de programa\EasyPHP-5.3.3.1\www\mysite\index.php on line 15)
And the line 15 is: $path = explode(“/”, substr($_SERVER[‘PATH_INFO’],1));
Hoang phuong
I have a problem only in the index.php file (Notice: Undefined index: PATH_INFO in C:\Archivos de programa\EasyPHP-5.3.3.1\www\mysite\index.php on line 15)
And the line 15 is: $path = explode(”/”, substr($_SERVER[‘PATH_INFO’],1));
shikhar
Which framework have you used ? Or is it your own framework ?
herou
thank you! i love it.
lacoste uk
There’s a few bugs I can see from the outset:
* Stripslashes
* Duplicate emails allowed (odd when it’s the login)
Saskia
Does it feature a payment method? so users can be charged for asking a question?
Flickr clone script
Does the script support multiple languages?
- Turker Tunali
  I also wonder.
Berj Boodanian
why would you create a directory called controllers when the files inside only have functions. The file structure looks as if its an mvc but its all using conventional php.
test
amol
Techo3
How can we install it in blogger??
tytyteyety
fsgfsgsfgfsgfsgfsgfsg
Pratik Joshi
Amazing !! 🙂 !
Mark Uretsky
stupid license!
aka
Can I use it by hosting
James
I have installed script, and am at index.php page… page says Log In and is asking for my email address and password but I never even registed, and when I attempt to put my email address and a password in that I just made up… it does nothing. What am I doing wrong?
Eric TF Bat
I’ve forked this and I’m going through initially fixing it to work in PHP7 (using mysqli_* instead of mysql_* functions). Once I’ve got that done, I’ll have a look at some of the bugs. I hope to get this working, and of course all my changes will be pushed back to my fork. I presume, since you haven’t done any work on this for a few years now, you won’t mind if I do.
Sandip
Amazing !! 🙂 !

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