string(30) "wuxi-shhxgmyxgs.qy.qiyanku.com"

array(4) {
  [0] => string(15) "wuxi-shhxgmyxgs"
  [1] => string(2) "qy"
  [2] => string(7) "qiyanku"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(4) "wuxi"
  [1] => string(10) "shhxgmyxgs"
}