Add filename to attachment page url

This doesn’t require a WordPress modification per se, but if you prefer to do it that way, here is a decent tutorial: http://shibashake.com/wordpress-theme/wordpress-page-redirect. Some people would, however, prefer to do this via the .htaccess file, here is a quick guide on how to do redirects that way: http://perishablepress.com/press/2006/01/10/stupid-htaccess-tricks/#red1.

Define orderby in url

adding this in the functions.php file works. Just remember to re-save your permalinks & empty the cache a few times to see the changes. add_action( ‘init’, ‘wpse13483_init’ ); function wpse13483_init() { add_rewrite_rule( ‘category/(.+?)/orderby/([^/]+)?/?$’, ‘index.php?category_name=$matches[1]&orderby=$matches[2]&order=asc’, ‘top’ ); add_rewrite_rule( ‘category/(.+?)/orderby/([^/]+)/order/([^/]+)?/?$’, ‘index.php?category_name=$matches[1]&orderby=$matches[2]&order=$matches[3]’, ‘top’ ); // with pagination; add_rewrite_rule( ‘category/(.+?)/orderby/([^/]+)/order/([^/]+)/page/([0-9]{1,})?/?$’, ‘index.php?category_name=$matches[1]&orderby=$matches[2]&order=$matches[3]&paged=$matches[4]’, ‘top’ ); }