string(34) "chikan-zjhsbjyxgs.sy.niaoshifu.com"

array(4) {
  [0] => string(17) "chikan-zjhsbjyxgs"
  [1] => string(2) "sy"
  [2] => string(9) "niaoshifu"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(6) "chikan"
  [1] => string(10) "zjhsbjyxgs"
}

int(6)

int(2)