php 处理递归提成的方案

CREATE TABLE `crm_proxy_bonux_rule` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '超过的部份提成规则ID',
`bouns_rule_name` varchar(20) NOT NULL COMMENT '规则名称,如D套餐0-20范围',
`rid` bigint(20) DEFAULT NULL COMMENT '为0,就是默认的全局设置',
`start_rang` smallint(6) DEFAULT NULL COMMENT '开始范围',
 `end_rang` smallint(6) DEFAULT NULL COMMENT '结束范围',
`bonus_rate` smallint(6) DEFAULT NULL COMMENT '提成率',
`bonus_reward` decimal(8,2) DEFAULT NULL COMMENT '奖励现金',
`chain_pre` int(11) DEFAULT NULL COMMENT '链表上一个值默认为0,表示根结点',
`chain_next` int(11) DEFAULT NULL COMMENT '链表下一个值',
`is_standard` enum('0','1') DEFAULT '0' COMMENT '是否是标准',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=12 DEFAULT CHARSET=utf8;

 private function bouns_recursion($range,$standard,&$rule_list,$amount){
       $price = 1000;
       $max =  $standard['end_rang']   ;//最大值  
      $min =  $standard['start_rang']   ;//最小值      
      $bonus_rate =  $standard['bonus_rate'];//分红率
      if($range<$min){
            return false;
        }
        $standard_amount = 0;
        $plus = 0;
        //是否是标准 第一个
      if($standard['is_standard']==1){
             $standard_amount = $price * $min * $bonus_rate / 100; //求提成 600   300 
       }else{
            $plus = 1; //第二次要累加        
     }
      if($range > $max){
         $number = ($max - $min)  + $plus;//算出差值值 5 4-3 == 1
         $amount = ($price * $number * $bonus_rate / 100); //求提成 200
     }else{
            $number = ($range - $min ) + $plus;//算出差值值 4 1
            $amount = ($price * $number * $bonus_rate / 100); //求提成 
    }
     $amount = $amount + $standard_amount;//800
     if(!empty($rule_list[$standard['chain_next']]) && $range > $max){
           return $amount += $this->bouns_recursion($range, $rule_list[$standard['chain_next']], $rule_list,$amount);
    }
    return $amount;
}