Monday, 19 September 2011

php web development tools - captcha

Web development tool  CAPTCHA, stands for Completely Automated Public Turing to tell Computers and Humans Apart.

A CAPTCHA is a program that can generate distorted text  that humans can see or listen but computer cannot. 

Applications of CAPTCHA systems
-- Preventing Spam in Blogs.
-- Protecting Website Registration.
-- Search Engine Bots.
-- Worms and Spam.

In web application development we can use the following CAPTCHA systems that are listed below
reCAPTCHA - In this type of CAPTCHA systems user can view the distorted text or also listen the text, now a days it is most popular CAPTCHA systems for web developers

Securimage  : The Securimage Captcha script is free open-source. here the  PHP script is used to generat complex images and complex CAPTCHA alphanumeric codes.

FreeCap - This script support GPL CAPTCHA script systems to stop spam


  1. very informative informations for begineers thanks for providing so much useful informations

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  2. wow! the great blog.
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    thanks for sharing the info.
    keep blogging.

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  3. wow!!!
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    keep blogging.

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  4. Hai, This is very informative Blog for this... Very superb for Captcha system Applications information... like this way...



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