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.
Resource Specification
Platform(s):
linux, freebsd
Date Added:
Feb 20, 2007
Last Updated:
Feb 20, 2007
Author:
Yinan Chen
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License # 1:
License Type:
GPL
Price:
Free
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