Math Captcha image validation
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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- Math Captcha image validation
- Filed in:
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PHP / Tutorials & Tips / Security
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- Date Added:
- Feb 20, 2007
- Last Updated:
- Feb 20, 2007
License and Pricing Information
GPL
Price: $0.00 USD
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Publisher Info
- Author:
- Yinan Chen
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