Introduction

This package provides the functionality to create CAPTCHAs (Completely Automated Public Turing tests to tell Computers and Humans Apart). Features include:

• Creating graphical CAPTCHAs using GD2
• Pluggable driver architecture using factory pattern
• Generic information about the CAPTCHA

The package creates CAPTCHAs; due to the stateless nature of the HTTP protocol, the logic to secure a webpage using the package must be specifically implemented. See the usage example for detailled information.

Currently, the graphical CAPTCHA driver depends on Image_Text which in turn requires TTF support to be compiled into PHP.