PHP Captcha Object
Dreamweaver CC compatible!
Quickly add Captcha functionality to your web forms with PHP Captcha Server Object (PHP/MySQL only):
According to Wikipedia “captcha (an acronym for "completely automated public Turing test to tell computers and humans apart") is a type of challenge-response test used in computing to determine whether or not the user is human”.
Captcha is a small image with randomly generated text placed on a web form next to a designated text field. To submit the form user must type the text seen on the image into the text field. Thoroughly written server-side code will allow the form to be submitted only if the text has been entered correctly. To make it even more “spam-proof” the verification text can be slightly scrambled, rotated and/or appear over a patterned background.
Since no modern software can (reliably) read text from images, Captchas make it really hard (if not impossible) to automate form submission procedure.