string(37) "ningxia-gshyrdxxjcyxgs.b2b.ksrank.com"

array(4) {
  [0] => string(22) "ningxia-gshyrdxxjcyxgs"
  [1] => string(3) "b2b"
  [2] => string(6) "ksrank"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(7) "ningxia"
  [1] => string(14) "gshyrdxxjcyxgs"
}

int(7)

int(2)