redis解決高並發下臟讀問題

    //解決並發情況下卡臟讀的問題
    protected function BingFa($mobile, $ent_id){
        $obj = EnterpriseMembers::getNewMemberCardByEntId($mobile, $ent_id);
        if(!$obj){
            return false;
        }else{
            $expire = 10;
            $key = 'new_card_'.$ent_id.'_'.$obj->member_card;
            $is_lock = Yii::$app->redis_php->setnx($key, time()+$expire);
            // 不能獲取鎖
            if(!$is_lock){
                $lock_time = Yii::$app->redis_php->get($key);
                if(time()>$lock_time){
                    Yii::$app->redis_php->del($key);
                    $is_lock = Yii::$app->redis_php->setnx($key, time()+$expire);
                }else{
                    return $this->BingFa($mobile, $ent_id);
                }
            }
            //如果鎖成功
            if($is_lock){
               $obj->mobile = $mobile;
               if($obj->save()){
                   Yii::$app->redis_php->del($key);
                   return $obj;
               }
            }
        }
    }