my code

function codex_custom_init() {
$labels = array(
'name' => _x('News', 'post type general name'),
'singular_name' => _x('News', 'post type singular name'),
'add_new' => _x('Add New', 'News'),
'add_new_item' => __('Add News'),
'edit_item' => __('Edit News'),
'new_item' => __('New News'),
'all_items' => __('All News'),
'view_item' => __('View News'),
'search_items' => __('Search News'),
'not_found' => __('No News found'),
'not_found_in_trash' => __('No News found in Trash'),
'parent_item_colon' => '',
'menu_name' => 'News',

);
$args = array(
'labels' => $labels,
'public' => true,
'publicly_queryable' => true,
'show_ui' => true,
'show_in_menu' => true,
'query_var' => true,
'map_meta_cap' => true,
'rewrite' => true,
'capability_type' => 'post',
'has_archive' => true,
'hierarchical' => false,
'menu_position' => 6,
'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'post-formats' ),
'taxonomies' => array('n', 'post_tag'),
'show_ui' => true,
);
register_post_type('n',$args);
}
add_action( 'init', 'codex_custom_init' );


Thanks


add_action('init', 'my_rewrite');
function my_rewrite() {
global $wp_rewrite;
$my_structure = '/%postname%.html';
$wp_rewrite->add_rewrite_tag("%postname%", '([^/]+)', "my-post-type=");
$wp_rewrite->add_permastruct('my-post-type', $my_structure, false);
$wp_rewrite->flush_rules(); // !!!
}


It changes example.com/my-post-type/test-1 to example.com/test-1.html

Warning:
Note the .html (dot HTML) at the end of the new permalink – just in case it gives you conflicts, also be aware of other things in your installation that may be using the same name as your custom post type, like pages, posts or categories, anything that can be accessed from the same url.

So far I have:
function my_rewrite() {
global $wp_rewrite;
$wp_rewrite->add_permastruct('my-post-type', '%postname%/', false);
add_rewrite_rule('my-post-type/([0-9]{4})/(.+)/?$', 'index.php?typename=$matches[2]', 'top');
$wp_rewrite->flush_rules(); // !!!
}

Thanks,

David

However, I have a quick question. How to add a “.html” extension to the link we’re talking about?

Thanks!