Mathcaptcha.plugin

Mathcaptcha.plugin is a plugin that presents users with a mathematical captcha instead of FUDforum's default captcha challenge.

Table of Contents Prerequisites Usage Code Also see

Prerequisites

None, this plugin can be uploaded and activated as-is on any forum.

Usage

If enables, users will see a mathcaptcha when trying to register or when posing anonymously (if enabled).

Code

File mathcaptcha.plugin:

 // Implement a simple mathematical CAPTCHA
 function plugin_mathcaptcha() {
 	$n1 = mt_rand(1,10); 
 	$n2 = mt_rand(0,10);
 	$answer = $n1 + $n2;
 
         $text = 'Please sum the two numbers: '. $n1 .' + '. $n2 .'<br />';
 	$text .= '<input type="text" name="turing_test" id="turing_test" size="25" required="required" />';
 	$text .= '<input type="hidden" name="turing_res" value="'. md5($answer) .'" />';
 	return $text;
 }

Also see

• Recaptcha.plugin, captcha plugin that used the Recaptcha service.
• Riddlecaptcha.plugin, captcha plugin that will ask the users simple questions.