递归统计团队奖, 计算每个人下线的业绩(pid)

public  function   ceshi(){
$this->getTotalteamperformance(4);

 }

function getTotalteamperformance($userid){//团队总业绩
      $totalteamperformance=0;
      // $userid=I('get.id');
      $userlist=M('user')->where(array('pid1'=>$userid))->select();
      if(count($userlist)>0){

  $totalteamperformance=$totalteamperformance+M('user')->where(array('pid1'=>$userid))->sum('total_amount')+M('user')->where(array('pid2'=>$userid))->sum('total_amount');

  foreach ($userlist as $k=> $v) {
     $totalteamperformance=$totalteamperformance+M('user')->where(array('pid1'=>$user_id))->sum('total_amount');
     $userlist1=M('user')->where(array('pid1'=>$v['user_id']))->select();
     //dump($userlist1);
     if(count($userlist1)>0){
$totalteamperformance=$totalteamperformance+$this->getChildernTotalteamperformance($userlist1);
     }
  }

      }
      echo $totalteamperformance;
   }
    function getChildernTotalteamperformance($user){
   $totalteamperformance=0;

     foreach ($user as $k=> $v) {
     $totalteamperformance=$totalteamperformance+M('user')->where(array('pid1'=>$v['user_id']))->sum('total_amount');
     $userlist1=M('user')->where(array('pid1'=>$v['user_id']))->select();
     if(count($userlist1)>0){
$totalteamperformance=$totalteamperformance+$this->getChildernTotalteamperformance($userlist1);
  }
    }

 return $totalteamperformance; 
     }