REMOTE_ADDR

string(12) "23.20.19.131"

HTTP_X_FORWARDED_FOR

string(26) "23.20.19.131, 23.20.19.131"
array(2) {
  [0]=>
  string(12) "23.20.19.131"
  [1]=>
  string(13) " 23.20.19.131"
}