zendframework/zend-captcha

Generate and validate CAPTCHAs using Figlets, images, ReCaptcha, and more


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Zend\Captcha component is able to manage “Completely Automated Public Turing test to tell Computers and Humans Apart” (CAPTCHA); it is used as a challenge-response to ensure that the individual submitting information is a human and not an automated process. Typically, a captcha is used with form submissions where authenticated users are not necessary, but you want to prevent spam submissions.