apply_filters( 'allowed_redirect_hosts', string[] $hosts, string $host )

1634		 *1635		 * @since 2.3.01636		 *1637		 * @param string[] $hosts An array of allowed host names.1638		 * @param string   $host  The host name of the redirect destination; empty string if not set.1639		 */1640		$allowed_hosts = (array) apply_filters( 'allowed_redirect_hosts', array( $wpp['host'] ), isset( $lp['host'] ) ? $lp['host'] : '' );1641 1642		if ( isset( $lp['host'] ) && ( ! in_array( $lp['host'], $allowed_hosts, true ) && strtolower( $wpp['host'] ) !== $lp['host'] ) ) {1643			$location = $fallback_url;1644		}1645 1646		return $location;