string(29) "yaan-cdxjgmjhs.qy.qiyanku.com"

array(4) {
  [0] => string(14) "yaan-cdxjgmjhs"
  [1] => string(2) "qy"
  [2] => string(7) "qiyanku"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(4) "yaan"
  [1] => string(9) "cdxjgmjhs"
}

int(4)

int(2)