Displays the name of the author of the current post.

The behavior of this function is based off of old functionality predating
get_the_author(). This function is not deprecated, but is designed to echo
the value from get_the_author() and as an result of any old theme that might
still use the old behavior will also pass the value from get_the_author().

The normal, expected behavior of this function is to echo the author and not
return it. However, backward compatibility has to be maintained.

function the_author( $deprecated = '', $deprecated_echo = true ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '2.1.0' );
	}

	if ( true !== $deprecated_echo ) {
		_deprecated_argument(
			__FUNCTION__,
			'1.5.0',
			sprintf(
				/* translators: %s: get_the_author() */
				__( 'Use %s instead if you do not want the value echoed.' ),
				'get_the_author()'
			)
		);
	}

	if ( $deprecated_echo ) {
		echo get_the_author();
	}

	return get_the_author();
}