Three ways to test Web form input with a CAPTCHA

Posted by Scott_Ruecker on Apr 14, 2008 1:07 PM EDT
Linux.com; By Ben Martin 		Mail this story
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Many Web forms these days feature a Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) as an effort to stop people from setting up computers to automatically fill in Web forms. A typical CAPTCHA is an image with some numbers and letters in it with distortion and/or background noise, and a Web form input field where you are to enter the numbers and letters from the image. This article investigates three CAPTCHA applications that you can use on a PHP Web site.

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I hate CAPTCHAs Sander_Marechal 0 972 Apr 14, 2008 1:37 PM

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