title: Has anyone got ArticleComments.php extension working with MW 1.20?
body: <p>I downloaded the ArticleComments.php from the <a href="http://jimbojw.com/wiki/index.php?title=ArticleComments_Extension" rel="nofollow">homepage</a>, and have copied it to my extensions directory.</p>
  
  <p>I add this line to the end of my LocalSettings.php :</p>
  
  
  
  <pre class="lang-php prettyprint-override"><code>require_once( "extensions/ArticleComments.php" );
  </code></pre>
  
  <p>But when I do, it knocks my wiki over until I disable it!
  The PHP error log says:</p>
  
  <blockquote>
    <p>Fatal error: Call to a member function addMessage() on a non-object in /opt/bitnami/apps/mediawiki/htdocs/extensions/ArticleComments.php on line 277</p>
  </blockquote>
  
  <p>where line 277 reads:</p>
  
  <pre class="lang-php prettyprint-override"><code>$wgMessageCache-&gt;addMessage('article-comments-name-string', 'Name');
  </code></pre>
  
  <p>Any ideas? This is a common extension, and I just don't know why I can't get it to work? Can anyone link me to the correct file / download in case my PHP file is corrupt in some way? Any info would be useful, I'm tearing my hair out!</p>