Preventing Comment Spam

[Emancipator]

Here is the code for anyone else who wants to try it out, hum over it or improve it. Rememeber to put a check into your php or your comment/forum code wont work at all

<script type="text/javascript">
    hidden field or do math */
    third='k value=1'
    second='n name=submitChec'
    other='klaslkdfas'
    first='<input type=hidde'
    out=first + second + third
    document.write(out + '>')
    </script> 

Fire the code within the form to add an extra element. If others have their own methods and dont mind sharing them i would be interested in seeing it, and I am sure folks can learn alot about this. Including myself.

[John]

Very good idea. I think I'm going to go buy the php bible, I know a little php but not enough to make my own applications, I'm getting tired of modifying other CMS's to suit my needs.

[Emancipator]

doesnt take alot of php know how to make a cms. Be sure to try this code to prevent comment spamming and see how it holds up.

[peach]

As you regulars know I love to write code and I do alot of it. I am however stumped on a SIMPLE and effective method to stop comment spam. I have been looking all over the internet for about the last 2 hours doing reading on it and dont see any really good and EASY to implement solution for comment spam. Keep in mind im not using wordpress or any other prebuilt blogging system. I am just looking for some simple way to obfuscate or block those lame-o spammers.

Feedback with links? Thanks Guys and Gals!

I made a comments component for Joomla with the following features that relate to spam control:

Toggle "registered users post only"
Toggle "force comment preview"
Toggle linking to commenters website (when turned off, the link is a rel=nofollow
Toggle "email mandatory"
Review comments yes/no

On my website I have all these options turned off, except for the email one. I used to get dozens of spam mails on various topics, then I put in the following function in, and since then I am getting no spam messages at all.
In the mean while, friendly visitors can publish feedback on the site instantly.

if (eregi($common_spam_pat,$mc_comment_name) || eregi($common_spam_pat,$mc_comment_email) || eregi($common_spam_pat,$mc_comment_homepage) || eregi($common_spam_pat,$mc_comment)) {
      mosRedirect("index.php?option=content&task=view&id=$id&Itemid=$Itemid",  _COM_C_SPAM);
  } 

This functions compares the form input fields to an array of trigger words, these are my trigger words:

.
.
.
.
/* Profanity warning for the faint-hearted */
.
.
.
.
.

$common_spam_pat= "sleepdeprivation|sleepdisorders|insomnia|phenterm ine|phentemine|vicodin|hydrocodone|levitra|ultram| ultram|cialis|soma|soma|diazepam|gabapentin|celebr ex|viagra|fioricet|ambien|valium|zoloft|finasterid e|lamisil|meridia|allegra|diflucan|zovirax|valtrex |lipitor|proscar|acyclovir|sildenafil|tadalafil|xe nical|melatonin|xanax|herbal|drugs|lortab|adipex|p ropecia|carisoprodol|tramadol|shemale|gangbang|coc k|anal|orgy|cock|anal|orgy|singleschristian|dating christian|cumeating|creampies|cumsucking|cumswappi ng|cumfilled|cumdripping|krankenversicherung|cumpu ssy|suckingcum|drippingcum|pussycum|swappingcum|ea tingcum|cum|cum|sperm|christiandating|jewishsingle s|sexmeetings|swinging|swingers|personals|sleeping |libido|grannies|mature|enhaement|sexual|gayteen|t eenchat|gaychat|adultfinder|adultfriend|friendfind er|friendadult|finderadult|finderfriend|discreteeo unters|cheatingwives|housewives|sex.|snowballing|f at|fat|diet|pills|weight|supplement|texasholdem|po ker|casino|blackjack|mortgage|refinaing|cashadvae| cashmoney|payday|netwasgroup.com|nic4u.com|wear4u. com|foxmediasolutions.com|liveplanets.com|aeternat ech.com|continentaltirebowl.com|chemsymphony.com|i nfolibria.com|globaleducationeurope.net|soma.125mb .com|mitglied.lycos.de|foxmediasolutions.com|jroun dup.com|feathersandfurvanlines.com|conecrusher.org |sbjbroadcasting.com|edthompson.com|codychesnutt.c om|artsmallforsenate.com|axionfootwear.com|protzon beer.com|candiria.com|bigsitecity.com|coresat.com| istarthere.com|amateurvoetbal.net|alleghanyeda.com |xadulthosting.com|datashaping.com|zick.biz|newpri eton.com|dvdsqueeze.com|xopy.com|webdevboard.com|d evaddict.com|eatoni.com|whiteguysgroup.com|guestbo okz.com|webdevsquare.com|indfx.net|snap.to|2y.net| astromagia.info|jixx.de|freesms";



You can add any terms to the list to fight spammers that still get through, and you might have to remove some words if the topic of your site in related to any of em.

[Emancipator]

great usage peach. I am trying to avoid using a source file to match words against but I am sure many will find your usage very handy.

[moonshield]

Yea thanks, that's great! Your list is pretty good, it even includes some vulgarities I have never even seen.

[Emancipator]

thats the fun part of the list method coming up with all the idiotic things people can do and say :P