[Alan @ CIT]

Try:

PHP Code:

$query = "SELECT erc_content.*, erc_contenttype.contenttype
    FROM erc_content
    LEFT JOIN erc_contenttype ON erc_content.contentid = erc_contenttype.contenttypeid
    " . ($_GET['contenttypeid'] ? "AND erc_content.contenttypeid = '" . $_GET['contenttypeid'] . "'" : '') . "
    ORDER BY erc_contenttype.displayorder, erc_content.displayorder";

$contents = $db->query_first($query); 


Although... your query looks wrong to me - it doesn't have a WHERE clause in it

Also, you shouldn't use $_GET[] directly within the query, clean it using the input_cleaner class first

Oh, and don't forget table prefixes!

Thanks,
Alan.