##########################################################################################################
#   WordPress Blacklist Comment SPAM prevention coded by LaughingLizard http://dinki.mine.nu/word/	  #
#    Compatible with all versions of WordPress	http://www.mindfulmusings.net/weblog/		         #
##########################################################################################################


Instructions:
1) Unzip all files into the root of your hard drive.
2) Edit import_blacklist.php and change your database values
3) Open a browser and run import_blacklist.php. You should see some "Imported domain/regex" messages
4) (this step only valid for WP version 1.0) Edit wp-comments-post.php and look for this function:

	if ('manual' == $comment_moderation) {
		$approved = 0;
	} else if ('auto' == $comment_moderation) {
		$approved = 0;
	} else { // none
		$approved = 1;
	}
	
Paste this right below it:

	$blacklists = $wpdb->get_results("SELECT domain FROM blacklist");
	foreach ($blacklists as $blacklist)  {
	$regex = "/".$blacklist->domain."/i";
		if (@preg_match($regex, $url))
			$approved = 0;
		if (@preg_match($regex, $email))
			$approved = 0;
		if (@preg_match($regex, $comment))
			$approved = 0;
		}

All Done! Now when a spammer (whose website url or comment matches the given list) tries
to leave a comment, it is set to be moderated by you.

5) (This step only valid for WP version 0.72 and below) Find this line in your b2comments.post.php:
    
    if ($ok) { // if there was no comment from this IP in the last 10 seconds
 
And paste this after that line:
 
 	$blacklists = $wpdb->get_results("SELECT domain FROM blacklist");
 	foreach ($blacklists as $blacklist)  {
 	$regex = "/".$blacklist->domain."/i";
 		if (@preg_match($regex, $url))
		     exit;
 		if (@preg_match($regex, $email))
 		     exit;
 		if (@preg_match($regex, $comment))
 		     exit;
 		}