停止机器人

The project is to help stop web bots in their tracks through forms, and other means of bot spam. Some of the features include: * CAPTCHA images (Requires ImageMagick at the moment) * Hidden fields with hash codes in them * (New ver. 0.2) Spam filters using regex or plain text I am open to any changes and/or ideas of which to improve this piece of code! While this code has been in some production sites, it has stopped over 10,000+ spam attacks per site per month on high volume sites! Bring your spam down to almost 0 by using this simple to use code!