string(41) "ningxia-zjsrdjdcjlctzyxgs.qiye.hbksco.com"

array(4) {
  [0] => string(25) "ningxia-zjsrdjdcjlctzyxgs"
  [1] => string(4) "qiye"
  [2] => string(6) "hbksco"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(7) "ningxia"
  [1] => string(17) "zjsrdjdcjlctzyxgs"
}