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This php class generates a picture to use in forms that perform CAPTCHA test (Completely Automated Public Turing to tell Computers from Humans Apart). After the test form is submitted a key entered by the user in a text field is compared by the class to determine whether it matches the text in the picture. The class is a fork of the original released at www.phpclasses.org by Julien Pachet with the name ocr_captcha. The following enhancements were added: