Fewer Trolls with CAPTCHA
Fed up with 'visitors' to your guestbook posting "Great Job! Try [this drug] for [this body part] enhancement"? Then you need something to bot-proof your forms. And one simple solution is a captcha.
The CAPTCHA script requires that your server version of php has been compiled to include the GD2 library (otherwise the images cannot be created!). Any respectable web hosting services will have GD2 pre-installed.
What is a captcha? Better known as a 'security image' applied in forms of all types to prevent 'bots from sending the form. For those of you interested, Captcha is an acronym for Completely Automated Public Turing Test to Tell Computers and Humans Apart. You can learn more about captchas at captcha.net , or one look at the image to the right will tell you what this is about.
A single configuration file allows you to adjust various parameters used by the image creation script. There is no need to edit the php script.
- use your own background image (the captcha is randomly selected)
- easily change font family, font size, font color, font rotation, and font weight
- script documented in case you really want to change it
- Works with register_globals off