This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Pti's Text-Math Antispam for comment


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. In new versions you can convert sentenses to image and customize it colors for better looking and improve your security!

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:

  1. Very easy to use, not need to configure anything
  2. Very tiny code, less than 199 lines
  3. Support localization, original .po file included
  4. Do not displays a complex images, just asks a simle math question
  5. It’s realy works!


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  • screenshot-2.jpg
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  1. Unpack files from to the /wp-content/plugins/ptimathcapcha/ directory or just “Install” through admin interface in plugins
  2. Activate the plugin through the ‘Plugins’ menu in WordPress
  3. Enjoy and time-to-time clean up your spam-comment folder


Is it REALY works?

Yes, it is.


Simple and effective

I used this plugin successfully for many years, until a more comprehensive security solution made it redundant. I still recommend Pti's Text-Math Antispam if your needs are simple: it's lightweight, humble, yet catches everything. Just check your spam folder periodically for those trackbacks you want to keep, because they'll always end up as false positives.
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Contributors & Developers

“Pti's Text-Math Antispam for comment” is open source software. The following people have contributed to this plugin.




  • Dutch translation added (thanks to Rene)
  • French translation added (thanks to stephane)
  • Use image checkbox fixed.


  • Fixed spelling errors (very sorry for this);
  • Brazilian portuguese translation added (thanks to Cleber Tavares Jr.)
  • Some code optimization.


  • Added Image color settings;
  • Some code optimization.


  • Some code optimization.


  • Added Convert_to_Image future;
  • Some code optimization.


  • Ukranian language added;
  • Some code optimization.


  • First release.