UL CAPTCHA: Generate images for CAPTCHA validation

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Version License PHP version Categories
ul-captcha 1GNU General Publi...5PHP 5, Graphics, Validation, Security
Description Author

This class can generate images for CAPTCHA validation.

It can create an image with a random validation text which is served in the JPEG format as the current script output.

The size of the image and the range of characters displayed in the image are configurable parameters.

The random text is stored in a session variable for subsequent verification.

The class can also generate a token for user verification in order to prevent CSRF attacks.

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  Files  
File Role Description
captcha.php Class class
example.php Example example
img.php Aux. image of the captha

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