Collecting name and email in form

Question

On a website I'm working on, I would like to collect a user's name and email address to add to a mailing list.

My question is NOT how to do this, I know that part.

What I would like to know is, how would I do this so as to avoid spam, robots, etc?

I would like to prevent as much non-human interaction as possible, while keeping the HTML interface as easy to use as possible.

I am using PHP as a back-end, if it matters.

Thanks,
Austin

Answer 1

• CAPTCHA – I suggest use some sort of 3D CAPTCHA, because it's much harder (maybe even impossible?) for robots to read.
• Use Javascript, somehow.
• Question that only human can answer.