Prevent Comment Spam in Gallery 2

Even though I've enabled CAPTCHA I'm still seeing a ton of comment spam inserted by spambots on my Menalto Gallery 2 site. I've looked around and there are SQL queries that will rid your Gallery2 site of spam, but it doesn't prevent new ones from being saved. I've finally got sick of it and decided to stop the problem by adding a snippet of code in AddComment.inc (under the gallery/modules/comment directory). Be sure to backup your existing AddComment.inc file first before applying this mod.

Right below this section:

      $comment->setCommenterId($gallery->getActiveUserId());
      $comment->setHost(GalleryUtilities::getRemoteHostAddress());
      $comment->setSubject($form['subject']);
      $comment->setComment($form['comment']);
      $comment->setAuthor($form['author']);
      $comment->setDate(time());

Add the following code:

  ##BEGIN Gallery Spam Prevention Mod by TechBlogByDave (http://www.techblogbydave.blogspot.com)
      $disallowed = array('http', 'url=');
      $checks = array($form['author'], $form['subject'], $form['comment']);
      foreach ($checks as $check){
          foreach ($disallowed as $dis){
              if (stristr($check, $dis)){
                  die("In order to combat spam, $check has been tagged as a disallowed keyword.  Your comment has not been saved.");
              }
          }
      }
  ##END Gallery Spam Prevention Mod

Save the file and voila- any comment with the text "http" or "url=" will be met with an error message and not even be saved to the datbase. You can even add additional keywords into the "disallowed" array that you don't want in comments such as cuss words. Keep in mind that when you upgrade your Gallery 2 to a newer version you will have to re-apply the mod. Hope this helps!