已使用但不起作用：

$my_query = new WP_Query( array( 
        \'post_type\' => \'businesslistings\',
        \'post_status\' => \'publish\',
        \'orderby\' => get_query_var(\'orderby\'), // will return orderby query string variable
        \'order\' => \'$var\', 
        \'paged\' => get_query_var(\'paged\'),
    ));