QuestionCaptcha is simple PHP library that is easy to integrate into your php forms and provies you with Turing test – based captcha protection. It is based on your own defined questions that users need to answer to pass the form.£10 off in stock models
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You can use exact string matches, number ranges and even REGULAR EXPRESSIONS!!!! This may look very simple, but it is a killer feature of my captcha. Check the live demos to see it in action!
One question can have more right answers (useful for example for numbers – 50 and fifty are both corrent answers on question “How much is 60-10?”).