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Updated: 02/20/2007
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.
- Categories
- Platforms
- Linux,
- FreeBSD
- Licenses
- GPL
- Author