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https://github.com/q2a/question2answer

Question2Answer is a free and open source platform for Q&A sites, running on PHP/MySQL.
https://github.com/q2a/question2answer

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Question2Answer is a free and open source platform for Q&A sites, running on PHP/MySQL.

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README 

        
Question2Answer

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[Question2Answer][Q2A] (Q2A) is a popular free open source Q&A platform for PHP/MySQL, used by over 20,898 [sites] in 40 languages.



**Note:** if you're using Q2A directly from git, make sure to use the master branch as that is the latest stable version. Or download an official release from the [Q2A website][Q2A].



Q2A is highly customisable with many awesome features:



- Asking and answering questions (duh!)

- Voting, comments, best answer selection, follow-on and closed questions.

- Complete user management including points-based reputation management.

- Create experts, editors, moderators and admins.

- Fast integrated search engine, plus checking for similar questions when asking.

- Categories (up to 4 levels deep) and/or tagging.

- Easy styling with CSS themes.

- Supports translation into any language.

- Custom sidebar, widgets, pages and links.

- SEO features such as neat URLs, microformats and XML Sitemaps.

- RSS, email notifications and personal news feeds.

- User avatars (or Gravatar) and custom fields.

- Private messages and public wall posts.

- Log in via Facebook or others (using plugins).

- Out-of-the-box WordPress 3+ integration.

- Out-of-the-box Joomla! 3.0+ integration (in conjunction with a Joomla! extension).

- Custom single sign-on support for other sites.

- PHP/MySQL scalable to millions of users and posts.

- Safe from XSS, CSRF and SQL injection attacks.

- Beat spam with captchas, rate-limiting, moderation and/or flagging.

- Block users, IP addresses, and censor words



Q2A also features an extensive plugin system:



- Modify the HTML output for a page with *layers*.

- Add custom pages to a Q2A site with *page modules*.

- Add extra content in various places with *widget modules*.

- Allow login via an external identity provider such as Facebook with *login modules*.

- Integrate WYSIWYG or other text editors with *editor/viewer modules*.

- Do something when certain actions take place with *event modules*.

- Validate and/or modify many types of user input with *filter modules*.

- Implement a custom search engine with *search modules*.

- Add extra spam protection with *captcha modules*.

- Extend many core Q2A functions using *function overrides*.



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All development is now taking place through GitHub. The collaborative development process is being managed by [Scott Vivian][1]. (Note that official releases are still distributed via the [Q2A website][Q2A].) See also:



- The [Q2A docs][2] for how to get started installing and using Q2A.

- The [Changelog][3] for what's new in each version.

- The [contributing file][4] for more information on how to get involved.



Thanks and enjoy!



Gideon & Scott



[Q2A]: http://www.question2answer.org/

[1]: http://www.question2answer.org/qa/user/Scott

[2]: https://docs.question2answer.org/

[3]: https://docs.question2answer.org/install/versions/

[4]: https://github.com/q2a/question2answer/blob/master/CONTRIBUTING.md

[releases]: https://github.com/q2a/question2answer/releases

[sites]: http://www.question2answer.org/sites.php