string(38) "jian-sxsydlcljsdjyxgs.sy.niaoshifu.com"

array(4) {
  [0] => string(21) "jian-sxsydlcljsdjyxgs"
  [1] => string(2) "sy"
  [2] => string(9) "niaoshifu"
  [3] => string(3) "com"
}

int(2)