Improve Custom Post Permalink Structure

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you can use and manage your permalink for custom post type. Custom Post Type Permalinks

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add_action('init', 'my_rewrite');
function my_rewrite() {
    global $wp_rewrite;
    $wp_rewrite->add_permastruct('typename', 'typename/%year%/%postname%/', true, 1);
    add_rewrite_rule('typename/([0-9]{4})/(.+)/?$', 'index.php?typename=$matches[2]', 'top');
    $wp_rewrite->flush_rules(); // !!!
}