Hi!

I would like to hide a module when a certain article i viewed in the main window. I found this PHP-code in the recipes-section:

$category_id = null;
if ( $option == "com_content" ) {
  if ( $view == "category" ) {
   /* category list pages (blog or list style) */
   $category_id = (int)$id;
  } else if (array_key_exists("catid",$_REQUEST)) {
   /* if the category id is in the URL */
   $category_id = (int)JRequest::getInt("catid",0);
  }
  if ( $category_id === null && $view == "article" ) {
   /* if it's an article page without the catid mentioned in the url */
   $nullDate = $db->Quote( $db->getNullDate() );
   $my_id = $db->Quote( $db->getEscaped( (int)$id ) );
   $jnow  =& JFactory::getDate();
   $now    = $db->Quote( $db->getEscaped( $jnow->toMySQL() ) );
   $query = "SELECT  title,  id,  catid "
       . " FROM #__content WHERE id = $my_id AND state = 1"
       . " AND ( publish_up = $nullDate "
       . " OR publish_up <= $now )"
       . " AND ( publish_down = $nullDate "
       . " OR publish_down >= $now  )";
   $db->setQuery( $query, 0, 1 );
   $row = $db->loadObject();
   $category_id = $row->catid;
  }
}
/* Now customise any of the following rules for your use.
* $category_id will correspond to the category id of the
* article being displayed (if one is being displayed!)
*/

if ($category_id == 35) return 51;/* on category 54, return module 0 */
if ($category_id == 54) return 0;/* on category 54, return module 0 */
return 0; /* default if nothing else matches */

Unfortunantly i also need to fill in "quick module or position or id to include" with the module ID, otherwise I get an "error loading modules" mesage.