Extension:Asirra

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

The Asirra Service itself is powered by Microsoft. Users have to distinct cat images from dog images, which is easy for Humans but impssible for bots.

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.

Knows bugs

 * Users can't register if you enable this for account creation. Sorry, I'm working on that.