AllAboutShare.com

This plugin for Wordpress 1.5.2, 2.0.x and 2.3 asks the visitor making the comment to answer a simple math question. This is intended to prove that the visitor is a human being and not a spam robot.

Example of such question:

This plugin does not require JavaScript or cookies. It uses a special encryption function; the result of the question is being passed via a hidden field. The result is being compared with the value entered by the visitor – after encrypring this value as well.

Download the plugin here : Plugin Homepage

Installation

This plugin can be installed in 5 easy steps:

• Download the plugin (see “Downloads” above).
• Decompress the .zip archive and put the files into your plugins directory (/wp-content/plugins/) or into a sub directory of the plugins directory.
• Enable the plugin in the WordPress Plugins admin page.
• Go to Options / Math Comment Spam, adjust the options and save.
  Important: You need to save the options when you use this plugin the first time or if you have updated from a previous version.
• Add code to the comments.php of your theme. In the following an example for the Wordpress standard theme (Kubrick):
  <?php/****** Math Comment Spam Protection Plugin ******/
if ( function_exists('math_comment_spam_protection') ) {
$mcsp_info = math_comment_spam_protection(); ?>
<p><input type="text" name="mcspvalue" id="mcspvalue" value="" size="22" tabindex="4" />
<label for="mcspvalue"><small>Spam protection: Sum of <?php echo $mcsp_info['operand1'] .’ + ‘ . $mcsp_info['operand2'] . ‘ ?’?></small></label>
<input type=”hidden” name=”mcspinfo” value=”<?php echo $mcsp_info['result']; ?>” /></p>
<?php } // if function_exists… ?>Add this code for example right after the field for the website URL.