get_comment_author_url_link() WordPress Function

function get_comment_author_url_link( $linktext = '', $before = '', $after = '', $comment = 0 ) {
	$url     = get_comment_author_url( $comment );
	$display = ( '' !== $linktext ) ? $linktext : $url;
	$display = str_replace( 'http://www.', '', $display );
	$display = str_replace( 'http://', '', $display );

	if ( '/' === substr( $display, -1 ) ) {
		$display = substr( $display, 0, -1 );
	}

	$return = "$before<a href='$url' rel='external'>$display</a>$after";

	/**
	 * Filters the comment author's returned URL link.
	 *
	 * @since 1.5.0
	 *
	 * @param string $return The HTML-formatted comment author URL link.
	 */
	return apply_filters( 'get_comment_author_url_link', $return );
}