Diferior 8.03 anti-spam

We all know, that captcha reduces the number of comments, because people are lazy to enter it. In that case I removed captcha in my blog, but few days later I found hundreds spam comments... This prompted me to make a system to protect against spam without the use of captcha.

I wrote it for my blog, but decided to share it to all Diferior users. It adds an invisible input to a comment form in posts and downloads.

Before doing any changes, backup all files.

Download Link

5a and 5b must be without <?php ?> diferior forum automatically adds these symbols.

1. Upload dif_spam_comments.sql to your database using PhpMyAdmin. This will create table for storing all spam comments in database.

2. Paste this code to tpl_resources/skio/style/style.css
.comment_inv { visibility:hidden; display:none; }
This will make input invisible.

3. Paste this to your conf.php file
# Use captcha? (if set to false, then will be used invisible input, to help detect spam) define ( 'USE_CAPTCHA', false );

4. Open templates/skio/read.tpl.php and templates/skio/file.tpl.php
In both files find lines:
<div> {img src="captcha/s/`$smarty.now`.jpg"|link alt="tpl_user_register_captcha"|translate onclick="javascript:reload_image(this)"} <input type="text" name="captcha" value="" /> </div>

And replace them with:

<div> {if $smarty.const.USE_CAPTCHA} {img src="captcha/s/`$smarty.now`.jpg"|link alt="tpl_user_register_captcha"|translate onclick="javascript:reload_image(this)"} <input type="text" name="captcha" value="" /> {else} <input class="comment_inv" type="text" name="inv" value="" maxlength="100" /> {/if} </div>

5. Now open functions/comments.php file find post function (136 line). We need edit just this function!

a)
Find line:

$captcha_p = trim ( $_POST [ 'captcha' ] );

replace it with
if( USE_CAPTCHA ) $captcha_p = trim ( $_POST [ 'captcha' ] ); else { if( (!isset($_POST['inv'])) OR (!empty($_POST['inv']))) $table = 'dif_spam_comments'; }
b)
Find
$err2 = $user -> validate_captcha ( $captcha_p );
and replace with
$err2 = (USE_CAPTCHA)?$user -> validate_captcha ( $captcha_p ):array();

c)
Find
else { throw new error ( 'Invalid comment table.' ); }
and replace with
elseif ( $table == 'dif_spam_comments' ) { //do nothing } else { throw new error ( 'Invalid comment table.' ); }

Now go drink some beer.

Sweet, thanks for contributing!

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