How to generate CAPTCHA?

By admin at 30 June, 2008, 1:35 pm

CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a simple test to determine if a user is a computer or a human. It’s is a type of challenge-response test used in computing to ensure that the response is not generated by a computer.
CAPTCHA helps to prevent spam abuse on the [...]