Модуль Материалы той же категории, что и открытая статья - Joomla 1.5: [FAQ] Часто задаваемые вопросы и ответы

function getCategory() {
		/** function for determining the category ID of a given page, referenced from:
		* http://forum.joomla.org/viewtopic.php?f=466&t=302292
		*/
	  	$iId = JRequest::getVar('id',0);
		$database = &JFactory::getDBO();
		if(JRequest::getVar( 'view', 0) == "section"){
			return JRequest::getVar( 'id', 0);
		}else if(Jrequest::getVar( 'view', 0) == "category"){
			$sql = "SELECT id FROM #__categories WHERE id = '$iId'";
			$database->setQuery( $sql );
			$row=$database->loadResult();
			return $row;
		}else if(Jrequest::getVar('view', 0) == "article"){
			$temp = explode(":",JRequest::getVar('id',0));
			$sql = "SELECT catid FROM #__content WHERE id = ".$temp[0];
			$database->setQuery( $sql );
			$row=$database->loadResult();
			return $row;
		}
	}

//get artical ID
$artical_id = JRequest::getVar('id');

//query the database with the article id to get the category ID  

$colname_cat_id = $artical_id ;

mysql_select_db($YOUR DATA BASE, $YOUR DATABASE TABLE);
$query_cat_id = sprintf("SELECT catid FROM jos_content WHERE id = %s", GetSQLValueString($colname_cat_id, "int"));
$cat_id = mysql_query($query_cat_id, $YOUR DATABASE TABLE) or die(mysql_error());
$row_cat_id = mysql_fetch_assoc($cat_id);
$totalRows_cat_id = mysql_num_rows($cat_id);

// insert the the category ID into a variable called $catID

$catID = $row_cat_id['catid'];

$catid = JRequest::getInt('catid');

$catid = $row_cat_id['catid'];

$link = mysql_connect('mysql_host', 'mysql_user', 'mysql_password');