string(38) "xingqing-nxbfyycyglyxgs.qy.qiyanku.com"

array(4) {
  [0] => string(23) "xingqing-nxbfyycyglyxgs"
  [1] => string(2) "qy"
  [2] => string(7) "qiyanku"
  [3] => string(3) "com"
}

array(2) {
  [0] => string(8) "xingqing"
  [1] => string(14) "nxbfyycyglyxgs"
}