Extension:VisualMathCaptcha

What can this extension do?
This extension allow to integrate a strong captcha with a math operation generated as image.

Download instructions
You can download VisualMathExtension from there.

Installation
To install this extension, add the following to LocalSettings.php:

This extension requires you have GD module for PHP.

Configuration parameters

 * $wgVisualMathCaptchaItemMax : [int] max value (included) for each number in operation ; Defaulted to 9.


 * $wgVisualMathCaptchaItemNum : [int] count of number in generated operator; Defaulted to 2.


 * $wgVisualMathCaptchaOperators : [array] operators allowed for generation; Defaulted to { '+', '-' }.

Using VisualMathCaptcha with extension Lockdown
VisualMathCaptcha uses a special page: SpecialPage:VisualMathCaptcha.

Add in LocalSettings.php

CorporateContact
VisualMathCaptcha can be used with CorporateContact.

ConfirmEdit
This captcha can be used instead of standard captcha of ConfirmEdit extension. To do so :
 * 1) Open ConfirmEdit.php, in ConfirmEdit extension directory, and change $wgCaptchaClass value to VisualMathConfirmCaptcha</tt>.
 * 2) Add following line in LocalSettings.php, after content copied from provided file LocalSettings.part</tt> :