WordPress at a glance
function is not described

wp_title_rss() WP 2.2.0

Display the blog title for display of the feed title.

  • Since 4.4.0 The optional $sep parameter was deprecated and renamed to $deprecated.
Hooks in function
Return

Nothing (null).

Usage

wp_title_rss( $deprecated );
$deprecated(string)
Unused.
Default: '–'

Code of wp title rss: wp-includes/feed.php WP 5.2.2

<?php
function wp_title_rss( $deprecated = '&#8211;' ) {
	if ( '&#8211;' !== $deprecated ) {
		/* translators: %s: 'document_title_separator' filter name */
		_deprecated_argument( __FUNCTION__, '4.4.0', sprintf( __( 'Use the %s filter instead.' ), '<code>document_title_separator</code>' ) );
	}

	/**
	 * Filters the blog title for display of the feed title.
	 *
	 * @since 2.2.0
	 * @since 4.4.0 The `$sep` parameter was deprecated and renamed to `$deprecated`.
	 *
	 * @see get_wp_title_rss()
	 *
	 * @param string $wp_title_rss The current blog title.
	 * @param string $deprecated   Unused.
	 */
	echo apply_filters( 'wp_title_rss', get_wp_title_rss(), $deprecated );
}