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This class can generate CAPTCHA images and validate its text. It can generate an image with 5 random letters and digits obfuscated by a few lines. The random text is stored in a class variable for subsequent validation. The generated image is displayed in the PNG format as the current script output
...This class can validate CAPTCHA images with RainCaptcha. It can generate an URL to display a CAPTCHA validation image served by the RainCaptcha service. The class can also send a request to RainCaptcha API to verify if the text that the user entered matches the text in the CAPTCHA image. RainCaptcha
...This class can generate random text images for CAPTCHA validation. It can generate a random CAPTCHA validation text that can have either numeric or alphanumeric characters. This validation text is stored a session variable for subsequent validation. The class generates an image in JPEG format with
...Security Image Support forum securityimage Generate images with text to make a CAPTCHA test This class generates and display images with random text characters to perform a CAPTCHA test and verify whether the current site user is a real human or a robot script. The class also displays a form with
...Dayyan's CAPTCHA Image Support forum captcha_image Generate images for CAPTCHA validation This package can be used to generate images for CAPTCHA validation. There is one class that can generate a random text string for validation. Another class is responsible for rendering the validation text.
...This class can authenticate users by showing them inkblot images. It can associate a given user password with a list of inkblot images. The user chooses the password after seeing a list of inkblots and tell what those inkblots look like. The class can authenticate the user after showing him the same
...This class can generate CAPTCHA validation with custom effects. It can generate an image with random characters from a configurable list of allowed characters sets. The text can be obfuscated with several types of noise effects like grayscale noise, color noise, dots, lines, circles, polygons, grind
...Cell CAPTCHA Support forum cellcaptcha Generate and validate CAPTCHA created with divs This class can be used to generate and validate CAPTCHA text that is created using colored div's and is stored in session variable. The class renders simulated text by shading certain table cells that show the
...Hello Captcha Support forum hello-captcha Validate humans with HelloCAPTCHA animated images This class can validate humans with HelloCAPTCHA animated images. It can send HTTP requests to the Web services API Web server of the HelloCAPTCHA site retrieve HTML to embed form fields and display an animated
...This class can perform CAPTCHA validation based on user clicks on circles. It render an image with several circles on random positions. Only one circle appears cut. The class performs CAPTCHA validation by checking the position where the user clicks on the image to verify it it is inside of the circle
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