If I Use Captcha Will I Be Able to Stop the Spam Completely in My Blog

If i use captcha will i be able to stop the spam completely in my blog?

The captchas seem to be fooled by adept people. The Akismet is better option in my view. Having said that you should still use captch along with Akismet :)

Spam Defeating All My Captcha

How about using reCAPTCHA? It has plugins that are easy to use (PHP for example).

Preventing Spam

One trick I like to use is to add a hidden input field to my forms that a real user would never see or change, but that a bot would blindly fill out.

Something like

<input name="spam_stopper" value="DO NOT CHANGE THIS" style="display:none;"/>

and then, in your form handling code, make sure the value of spam_stopper is "DO NOT CHANGE THIS".

A smart bot may ignore display:none, but that's not too likely - many do ignore <input type="hidden"> though, so I wouldn't use that...

Stopping spam in web page

There you go :) http://akismet.com/

There's an API, you send them the comment body and they reply if it's spam or not. This is (maybe the best) spam hunting service, they have large word databases and good self-learning filters.

Additionally, it's free for personal use. I don't know how much it costs for business.

I'm in no way affiliated with them, I just found it by chance a couple of years ago.

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