When installing the next plugin, I get a fatal error:

Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`

in this code:

$remote_addr = getenv('HTTP_CLIENT_IP')?getenv('HTTP_CLIENT_IP'):
  getenv('HTTP_X_FORWARDED_FOR')?getenv('HTTP_X_FORWARDED_FOR'):
  getenv('HTTP_X_FORWARDED')?getenv('HTTP_X_FORWARDED'):
  getenv('HTTP_FORWARDED_FOR')?getenv('HTTP_FORWARDED_FOR'):
  getenv('HTTP_FORWARDED')?getenv('HTTP_FORWARDED'):getenv('REMOTE_ADDR');

Most likely due to the transition to php8.
Help me place the brackets correctly please.