About ---------------------------------------------------------------------- 3DCaptcha is an easy to use captcha written in PHP. It features: * A new approach to captchas, using human's spatial cognition abilities to differentiate humans from machines. * It uses a markov-chain to generate words that resemble human language and are easy to type, yet avoid dictionary lookups. * It's easy to implement. Enjoy. Installation ---------------------------------------------------------------------- 3DCaptcha requires PHP4, with gd image support. To find out how to install gd check out this URL: http://php.net/image You'll also need to add TrueType support. By default, 3DCaptcha uses PHP's $_SESSION variable. If you have a custom session handler, replace all calls to the $_SESSION variable. To generate a word, include TextGen.php. This generates a text. To display an image, add this HTML tag: <img src="3DCaptcha.php" alt="captcha"> The php code will generate an image with the text in the $_SESSION variable. License ---------------------------------------------------------------------- 3DCaptcha is released under GPLv3. Contact ---------------------------------------------------------------------- http://www-personal.umich.edu/~mressl/3dcaptcha Tell me what you think about 3DCaptcha, so it only gets better and better!