I am trying to detect is a visitor is human or not. I just got an idea but not sure if this will work or not. But if I can store a cookie on the persons browser and retrieve it when they are browsing my site. If I successfully retrieve the cookie can this be a good technique to detect bots and spiders?
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A well-designed bot or spider can certainly store — and send you back — whatever cookies you’re sending. So, no, this technique won’t help one bit.