Technology spammers are improving with every passing second, I think. If you leave comments enabled for all, and your site is found spammers, approximately 100-150 spam-comments per hour is provided to you.
The idea of this plugin is quite simple — to simplify the life of users and make life difficult for spammers as possible. This plugin does not extradite complex images, from which it is simply impossible at times to see something. This plugin gives a simple sentence with a math question like «How much is eight minus three …» or «How much is six multiplied by five …». Read the text of the person and understand what he should do a simple operation is not difficult, similar to the CAPTCHA contain numbers and actions that can make life easier for burglars to the same captcha will have trouble.
All spam comments marked as spam automatically, you just have to periodically simply press the button «clean the spam» and this is all.
Plugin benefits:
a. Very easy to use, not need to configure anything
b. Very tiny code, less than 100 lines
c. Support localization, original .po file included
d. Do not displays a complex images, just asks a simle math question
e. Can convert questions to images
f. It’s realy works!
Downloads:
ptimathcapcha.zip (v1.0) (external link)
ptimathcapcha.zip (v1.3) (external link) (wat’s new)
Screenshots:
