string(35) "yangzhou-tzsxxdqthc.qiye.hbksco.com"

array(4) {
  [0] => string(19) "yangzhou-tzsxxdqthc"
  [1] => string(4) "qiye"
  [2] => string(6) "hbksco"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(8) "yangzhou"
  [1] => string(10) "tzsxxdqthc"
}