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  1. #1
    New Coder
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    Question A Free Adless Captcha For My Website

    Following the increasing number of spam messages I am receiving from a contact form in my website, I want to implement a readable captcha that will authenticate message senders. If anyone knows of a website that offers free adless captcha that I can add to my website, please let me know. Thank you.

  • #2
    Senior Coder
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    white hat web design have a nice easy to use captcha but some bots are smart enough to OCR it and submit it with a valid code.

    Mix that into the mix with random field names (mrarrowhead.com) and a emailed confirmation link and you'll probably eliminate the spam.
    See my new CodingForums Blog: http://www.codingforums.com/blogs/tangoforce/

    Many useful explanations and tips including: Cannot modify headers - already sent, The IE if (isset($_POST['submit'])) bug explained, unexpected T_CONSTANT_ENCAPSED_STRING, debugging tips and much more!

  • #3
    rgb
    rgb is offline
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    I've stopped nearly all spam from my contact forms by validating out the '<a href = ' in the body of the message. Most spam includes a web link.

  • #4
    Regular Coder Redcoder's Avatar
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    You could make the links nofollow...that way, those spam links will have no gain in Google page rank.

    PHP Code:
    <a rel "nofollow" href="http://www.codingforums.com/php/...></a> 
    Try Google captcha - easy to install and use.

    You could also try a blog comment hosting service like Disqus - they have data from multiple websites, so if an ip is flagged for spam on one website, it won't be allowed to comment on your website - does the job for you already.
    Last edited by Redcoder; 03-24-2014 at 09:53 PM.


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