Ticket #17808: add-to-functions.txt

// Register custom post type
function create_post_type() {
        register_post_type( 'custom_news',
                array(
                        'labels' => array(
                                'name' => __( 'News' ),
                                'singular_name' => __( 'News' )
                        ),
                'public' => true,
                'has_archive' => true,
                'exclude_from_search' => false,
                'supports' => array('title', 'editor', 'revisions', 'author', 'excerpt', 'thumbnail'),
                'rewrite' => array('slug' => 'news', 'with_front' => 'false')
                )
        );

}
add_action( 'init', 'create_post_type' );





// Create custom feed from template
function create_newsfeed() {
    load_template( TEMPLATEPATH . '/news-feed.php');
}

// Replace default feed rewrite rules
function customise_feed_rules($rules) {
    // Remove all feed related rules
    $filtered_rules = array_filter($rules, function($rule) {
        return !preg_match("/feed/i", $rule);
    });
    // Add the rule(s) for your custom feed(s)
    $new_rules = array(
        'feed/newsfeed' => 'index.php?feed=newsfeed'
    );
    return $new_rules + $filtered_rules;
}

// Add the custom feed and update rewrite rules
function add_newsfeed() {
    global $wp_rewrite;
    add_action('do_feed_newsfeed', 'create_newsfeed', 10, 1);
    add_filter('rewrite_rules_array','customise_feed_rules');
    $wp_rewrite->flush_rules();
}

add_action('init', 'add_newsfeed');