string(37) "nansha-rdgzxnysbyxgs.sy.niaoshifu.com"

array(4) {
  [0] => string(20) "nansha-rdgzxnysbyxgs"
  [1] => string(2) "sy"
  [2] => string(9) "niaoshifu"
  [3] => string(3) "com"
}

int(2)