Extension:Asirra

What's this?
Asirra extension is based on Extension:ConfirmEdit by Brion Vibber which provides various CAPTCHA tools for MediaWiki for protection against spambots and other automated tools.

The Asirra Service itself is powered by Microsoft. Users have to distinguish cat images from dog images, a task which is easy for humans but difficult for bots.

Try it!
If you want to see it in action, try adding some to URLs to the Test Page at cedegawiki.net. I had several people replacing the contents of various other pages with nonsense. Please be aware that you destroy something by doing so, and it is considered vandalism, even if you do it to test Asirra!

Installation
The ConfirmEdit extension requires MediaWiki 1.11.0 or higher and PHP5, and so does it's Asirra module.


 * Download the latest version and save it to your computer
 * Unzip all files to the extensions/ConfirmEdit/ folder
 * Edit LocalSettings.php in the root of your MediaWiki installation, and add the following line near the bottom:

Configuration parameters

 * wgAsirraEnlargedPosition: [str] Can be one of top, bottom, left, rigth. Defaults to bottom.


 * $wgAsirraCellsPerRow</tt>: [int] Number of images per row. Defaults to 6</tt>.

For other configuration options and user rights, please refer to Extension:ConfirmEdit.

Changelog

 * 0.3: Fixed a bug that kept users from registering new accounts
 * 0.4: Major improvements to JavaScript
 * 0.5: Fixed "Undefined property" notice in Asirra.class.php on line 30

Known bugs

 * Submitting the forms does not work on some non-apache webservers, due to a script path incorrectly set. Temporary workarround: In Asirra.class.php search for "// Asirra URLs", set $asirra_localpath to the URL of Assira's plugin directory, usually "/wiki/extensions/ConfirmEdit". --Bachsau 21:59, 8 June 2011 (UTC)