Controlling sort order with WP_rewrite in 2.0.x

[stewart@…]

In the mod_rewrite world, you could control the sort order of various permalinks with rules like:

RewriteRule ^{(.+)/?$ /index.php?category_name=$1&order=ASC [QSA,L]}

There doesn't seem to be an equivalent in the super-duper new WP_Rewrite functions.

[ryan]

It can be done with a plugin.

[stewart]

How?

[davidhouse]

By hooking onto posts_orderby:

function force_desc($orderby) {
  $orderby = preg_replace('/ORDER BY ([^ ]+?) (ASC|DESC)?/', 'ORDER BY $1', $orderby);
  return $orderby
}

[davidhouse]

(Adding the missing line:)

add_filter('posts_orderby', 'force_desc');

Of course, the above func was just an example. You'd probably want to go for desc or asc based on some parameter.