string(40) "dujiangyan-cdxngyzsjcps.sy.niaoshifu.com"

array(4) {
  [0] => string(23) "dujiangyan-cdxngyzsjcps"
  [1] => string(2) "sy"
  [2] => string(9) "niaoshifu"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(10) "dujiangyan"
  [1] => string(12) "cdxngyzsjcps"
}

int(2)