string(35) "nanjing-njyywlkjyxgs.qy.qiyanku.com"

array(4) {
  [0] => string(20) "nanjing-njyywlkjyxgs"
  [1] => string(2) "qy"
  [2] => string(7) "qiyanku"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(7) "nanjing"
  [1] => string(12) "njyywlkjyxgs"
}

int(7)

int(2)