Math Captcha image validation

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With all the Captcha decoders these days, its impossible to build a solid Captcha image validator with a string. The solution? Have a captcha that asks simple math addition questions! Decoders are not very good at breaking these. This tutorial will show you how to make a basic math CAPTCHA validtion form. This requires that you have the GD library for PHP installed to work.

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Filed in:
Scripts / PHP / Scripts & Programs / Security Systems / Captcha Scripts
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Last Updated:
Feb 20, 2007 
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