MathGuard

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3.0 Other/Proprietary License with Source
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MathGuard project is a PHP class that inserts a small piece of HTML code into your HTML form...

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MathGuard project is a PHP class that inserts a small piece of HTML code into your HTML form which requires the user to evaluate an expression consisting of two random numbers.

When user submits the form with the answer, the answer is hashed and compared to the security code that has been submitted as well. This way you can easily protect your forms from spambots.

What's New in This Release:

This version features more complex rendering of the security question.
This question now consists of small random letters directly inserted to HTML, instead of just writing the plain numbers into the source code of the Web page.
This way, the protection against spambots is even stronger.
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Last updated on July 19th, 2007
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MathGuard

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