COTCHA COTCHA is an acronym for Coded Objective to Tell Computers and Humans Apart.
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COTCHA Description

Have a web form that spammers are using for their own Devious purposes? Many times these forms are actually used by Robots-- programs which surf the Internet and submit junk into web forms everywhere. The problem for these robots is that they're not very smart. Usually any sort of challenge which would be obvious to a human will completely confound a program. My COTCHA script is one of these "challenges. " It generates a numeric sequence and displays it right in your form -- even a form that you have had made for you, or one that you've downloaded from the Internet. When the user or robot submits the form, my script checks to see if this numeric code has been typed correctly. If not, the process is interrupted. Right Now the COTCHA number is Plain Text� the next step of this script�s development is to create an image of the �Cotcha� code using ImageMagick. Since most web servers don�t come with the ImageMagick program preinstalled, I�m going to leave it off until it�s absolutely critical or someone makes a special request for the code to be "imagefied. "So if you�re having trouble with comment spam, feel free to get this script. Subscribe to the RSS feed as well so you can be kept up to date on New Releases.

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