string(36) "shanwei-rdgzxnysbyxgs.qy.qiyanku.com"

array(4) {
  [0] => string(21) "shanwei-rdgzxnysbyxgs"
  [1] => string(2) "qy"
  [2] => string(7) "qiyanku"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(7) "shanwei"
  [1] => string(13) "rdgzxnysbyxgs"
}