get_author_feed_link() WordPress Function

function get_author_feed_link( $author_id, $feed = '' ) {
	$author_id           = (int) $author_id;
	$permalink_structure = get_option( 'permalink_structure' );

	if ( empty( $feed ) ) {
		$feed = get_default_feed();
	}

	if ( ! $permalink_structure ) {
		$link = home_url( "?feed=$feed&amp;author=" . $author_id );
	} else {
		$link = get_author_posts_url( $author_id );
		if ( get_default_feed() == $feed ) {
			$feed_link = 'feed';
		} else {
			$feed_link = "feed/$feed";
		}

		$link = trailingslashit( $link ) . user_trailingslashit( $feed_link, 'feed' );
	}

	/**
	 * Filters the feed link for a given author.
	 *
	 * @since 1.5.1
	 *
	 * @param string $link The author feed link.
	 * @param string $feed Feed type. Possible values include 'rss2', 'atom'.
	 */
	$link = apply_filters( 'author_feed_link', $link, $feed );

	return $link;
}
Uses	Description
wp-includes/formatting.php:trailingslashit()	Appends a trailing slash.
wp-includes/link-template.php:home_url()	Retrieves the URL for the current site where the front end is accessible.
wp-includes/link-template.php:author_feed_link	Filters the feed link for a given author.
wp-includes/link-template.php:user_trailingslashit()	Retrieves a trailing-slashed string if the site is set for adding trailing slashes.
wp-includes/plugin.php:apply_filters()	Calls the callback functions that have been added to a filter hook.
wp-includes/feed.php:get_default_feed()	Retrieve the default feed.
wp-includes/option.php:get_option()	Retrieves an option value based on an option name.
wp-includes/author-template.php:get_author_posts_url()	Retrieves the URL to the author page for the user with the ID provided.
Used By	Description
wp-includes/user.php:wp_list_users()	Lists all the users of the site, with several options available.
wp-includes/general-template.php:feed_links_extra()	Display the links to the extra feeds such as category feeds.
wp-includes/deprecated.php:get_author_rss_link()	Print/Return link to author RSS feed.
wp-includes/author-template.php:wp_list_authors()	Lists all the authors of the site, with several options available.