php抽奖功能

在项目开发中经常会遇到花钱抽奖类型的需求。但是老板总是担心用户用小钱抽到大奖。这样会导致项目亏损。下边这段代码可以有效制止抽奖项目亏钱。

个人奖池：

语言：thinkphp redis mysql 

表：desire抽奖商品表 desire_log用户抽奖奖品表 user_desire_log用户抽奖记录表   desire_risk抽奖风控表

需求：用户奖池分为进行中奖池 和已完成奖池 当用户抽到大奖后 用户个人奖池重置 否则将继续抽奖 最后一次抽奖必中大奖 通过风控金额来判断用户是否可以抽大奖

　　当所有用户已完成的抽奖 盈利大于风控金额的时候可以让用户抽大奖 否则用户抽不到大奖

<?php  

　　　//抽奖接口

    public function desire()
    {
        $userData = $this->userSessionData();///用户的唯一标识
        $time = time();
        $this->limit_reward_time($userData['id'], $time);///限制抽奖间隔时间 防止被恶意刷奖品
        //活动开启开关
        $num = input('num/d');
        if (!$num) {
            output('1008', '参数错误');
        }
        if ($num!=1){
            if ($num !=10){
                if ($num !=100){
                    output('1008', '参数错误');
                }else{
                    $send = $this->draw($num);
                }
            }else{
                $send = $this->draw($num);
            }
        }else{
            $send = $this->draw($num);
        }
        if ($send != '金币不足') {
            output('200', '列表', $send);
        } else {
            output('1012', $send);
        }
    }



　　/////抽奖核心
　　
    public function draw($num)
    {
        $userData = $this->userSessionData();
        $resultSend = Cache::get('奖池名称加上用户的唯一标识，确保一人一奖池' . $userData['id']);//获取个人奖池
        if (!empty($resultSend)) {
            $userRedis = unserialize(Cache::get('newdesiredraw' . $userData['id']));///将奖池序列化
        } else {
            $userRedis = '';///当前用户不存在奖池
        }
　　　　 ///查询当前用户的金币
        $desireDiamonds = Db::connect('db_qmconfig')->name('user_money')->where(['uid' => $userData['id']])->field('diamonds')->find();
        $sendNum = $num;
        if ($desireDiamonds['diamonds'] < $num) {
            return ['msg' => '金币不足'];///判断当前用户的金币是不是够抽奖
        }
        $gift_height = 0;///检测是否更新个人奖池和抽奖数量
        $newNum = 0;///检测下一轮抽奖数量
        $suiji = Db::connect('db_qmconfig')->name('desire')->order('num desc')->find();///随机小礼物
        if ($userRedis) {///如果用户奖池存在
            $joins = [
                ['gift_info f', 'd.giftid = f.id']
            ];
            $gift = Db::connect('db_qmconfig')->name('desire')
                ->alias('d')
                ->join($joins)
                ->where(['d.state' => 1])
                ->order('f.price desc')
                ->field('f.name,f.price,f.egif,d.num,f.id,d.position')->find();
　　　　　　　　///查询抽奖表的礼物
            if (!$gift){
                return ['msg'=>'礼物查询错误'];
            }
　　　　　　　///查询用户的总抽奖数量
            $user_all = Db::connect('db_qmconfig')->name('user_desire_log')->order('kind desc')
                ->where(['uid'=>$userData['id'],'state'=>0])->field('SUM(num) as kindNum')->find();
            //十次抽奖 必中
            $count = count($userRedis);
            if ($num == 10) {
                $where[] = ['d.state', '=', 1];
                $where[] = ['d.ten', '=', 1];
                $giftId = $this->giftInfo($where);
                if ($giftId) {
                    $result[] = $giftId[0]['id'];
                }
                $num = $num - 1;
            }

            ///百次抽奖 必中
            if ($num == 100) {
                $where[] = ['d.state', '=', 1];
                $where[] = ['d.hundred', '=', 1];
                $giftId = $this->giftInfo($where);

                $lwhere[] = ['d.state', '=', 1];
                $lwhere[] = ['d.ten', '=', 1];
                $lgiftId = $this->giftInfo($lwhere);
                if ($lgiftId) {
                    for ($l=0;$l<10;$l++){
                        $result[] = $lgiftId[0]['id'];
                    }
                }

                if ($giftId) {
                    $result[] = $giftId[0]['id'];
                }
                $num = $num - 11;
            }
            if ($num ==1){
                if ($user_all){
                    $number1 = '';
                    $num1 = str_split($user_all['kindNum']);
                    $number = $num1[count($num1) - 1];
                    if ($user_all['kindNum']>98){
                        $number1 = $num1[count($num1) - 2];
                    }
                    if (($number==9)&& ($number1 !=9)){ //十抽必中
                        $where[] = ['d.state', '=', 1];
                        $where[] = ['d.ten', '=', 1];
                        $giftId = $this->giftInfo($where);
                        if ($giftId) {
                            $result[] = $giftId[0]['id'];
                        }
                        $num = $num - 1;
                    }

                    if (($number1==9) && ($number==9)){//百抽必中
                        $where[] = ['d.state', '=', 1];
                        $where[] = ['d.hundred', '=', 1];
                        $giftId = $this->giftInfo($where);
                        if ($giftId) {
                            $result[] = $giftId[0]['id'];
                        }
                        $num = $num - 1;
                    }
                }
            }
　　　　　　　 ////判断当前奖池的奖品是否够此次抽奖 如果奖池奖品数量不够此次抽奖 将此次奖池抽完后 获取剩下要抽将的数量 重置奖池 并且递归此方法传入剩下要抽的数量
            if ($count < $num) {
                $newNum = $num - $count;
                $num = $count;
            }
            $user = Db::connect('db_qmconfig')
                ->name('desire_log')->where(['uid' => $userData['id']])
                ->field('SUM(num) as num')
                ->find();///已抽数量
            if (!$user){
                return ['msg'=>'已抽数量有误'];
            }
            $res['zongshu'] = Db::connect('db_qmconfig')
                ->name('desire')->where(['state' => 1])
                ->field('SUM(num) as num,checksum')
                ->find();///总数量
            if (!$res['zongshu']){
                return ['msg'=>'总数量有误'];
            }
            $resNum = 0;
            ////获取个人多少次抽奖
            if (($user['num']+$sendNum) > $res['zongshu']['checksum']) {
                $res['zongshu']['user_num'] = $user['num'] % $res['zongshu']['checksum']; ///获取余数
                if (($res['zongshu']['user_num'] + $sendNum) > $res['zongshu']['checksum']) {
                    ///获取这次抽奖的数量
                    $resNum = $sendNum - (($res['zongshu']['user_num'] + $sendNum) - $res['zongshu']['checksum']);
                }
//                return ['msg'=>$res['zongshu']['user_num']];
            }else{
                $res['zongshu']['user_num'] = $user['num'];
            }
            $cruuy = 0;
            ///随机选择奖池
            for ($i = 0; $i < $num; $i++) {
                $send = array_rand($userRedis);
                if ($resNum > 0) {
                    ///如果本轮奖池抽完 并且没有抽到大奖 那么必中大奖
                    $result[] = $gift['id'];
                    $gift_height = 1;//抽到大奖后更改三个变量状态
                    $resNum=0;
                    $cruuy = 1;
                } else {
                    if ($userRedis[$send]==$gift['id']){
                        $haveJoin = [
                            ['desire_log d', 'd.cid = u.id'],
                            ['gift_info f', 'd.giftid = f.id']
                        ];
                        $all  = Db::connect('db_qmconfig')
                            ->name('user_desire_log')
                            ->alias('u')
                            ->where(['u.state'=>1])
                            ->field('SUM(u.num) as num')->find();
//                        var_dump($all);
　　　　　　　　　　　　　　///如果抽到大奖
                        if ($all['num']==null){
　　　　　　　　　　　　　　　　　///如果这是整个奖池第一轮抽奖 那么可以中大奖
                            $result[] = $suiji['giftid'];
                        }else{
　　　　　　　　　　　　　　　　　
                            $alls  = Db::connect('db_qmconfig')->name('user_desire_log')
                                ->alias('u')
                                ->where(['u.state'=>1])
                                ->join($haveJoin)
                                ->field('SUM(f.price*d.num) as num')->find();
　　　　　　　　　　　　　　　　　///查询奖池风控金额
                            $reskList = Db::connect('db_qmconfig')->name('desire_risk')->find();
                            $riskPrice = $all['num'] * 20 - $alls['num'];
　　　　　　　　　　　　　　　　　///如果风控金额小于当前已完成抽奖的金额 那么代表软件处于盈利状态 可以中大奖
                            if (($riskPrice >= $reskList['price'])&&($cruuy==0)){
                                $result[] = $userRedis[$send];
                                $gift_height = 1;
                                $cruuy = 1;
                            } else{
　　　　　　　　　　　　　　　　　　　///如果风控金额大于当前已完成抽奖金额 不能中大奖 随机选择一次小奖品 替换大奖
                                $result[] = $suiji['giftid'];
                            }
                        }

                    }else{
                        $result[] = $userRedis[$send];
                    }
                }
　　　　　　　　　　///清空个人奖池此次抽奖的礼物
                unset($userRedis[$send]);
            }
　　　　　　　////新增用户抽奖次数 
            $result = array_count_values($result);
            $user_desire_list = Db::connect('db_qmconfig')->name('user_desire_log')->order('id desc')->where(['uid'=>$userData['id']])->find();
            if ($user_desire_list){
                if ($user_desire_list['state']==0){
                    $user_desire_logData[ 'kind'] = $user_desire_list['kind']+1;
                }else{
                    $user_desire_logData[ 'kind'] = 1;
                }
            }else{
                $user_desire_logData[ 'kind'] = 1;

            }
            $user_desire_logData['uid'] =$userData['id'];
            $user_desire_logData['ctime'] =time();
            $user_desire_logData['num'] =$sendNum;
　　　　　　　////更改此轮抽奖后 用户奖池的状态
            if ($gift_height==1){
                $user_desire_log_update = Db::connect('db_qmconfig')->name('user_desire_log')
                    ->where(['uid'=>$userData['id'],'state'=>0])->update(['state'=>1]);
                $user_desire_logData[ 'state'] = 1;
            }else{
                $user_desire_logData[ 'state'] = 0;
            }
            $user_desire_log = Db::connect('db_qmconfig')->name('user_desire_log')->insertGetId($user_desire_logData);
            foreach ($result as $k => $v) {
                if ($resNum == ($k + 1)) {
                    ///如果这次抽奖大于奖池总数 那么更新奖池并且抽奖剩下的次数
                    Cache::set('newdesiredraw' . $userData['id'], serialize([]));
                    return $this->draw($sendNum - ($k + 1));
                }

　　　　　　　　   ////礼物新增用户背包　　
                $data = [
                    'uid' => $userData['id'],
                    'giftid' => $k,
                    'num' => $v,
                    'ctime' => time(),
                    'cid' => $user_desire_log
                ];
                $join = [
                    ['gift_info f', 'd.giftid = f.id']
                ];
                $gift_info = Db::connect('db_qmconfig')->name('desire')
                    ->alias('d')
                    ->join($join)
                    ->where(['d.giftid' => $k])
                    ->field('f.name,f.egif,d.position')->find();
                $gift_infonum['num'] = $v;
                $list['gift'][] = array_merge($gift_info, $gift_infonum);
                $desireLog = Db::connect('db_qmconfig')->name('desire_log')->insert($data);
                $userKnapsack = Db::connect('db_qmconfig')->name('gift_knapsack')->where(['uid' => $userData['id'], 'giftid' => $k])->field('id,num')->find();
                if ($userKnapsack) {
                    $userKnapsackData = [
                        'num' => $v + $userKnapsack['num'],
                        'updatetime' => time()
                    ];
                    $userKnapsackUpdate = Db::connect('db_qmconfig')->name('gift_knapsack')->where(['id' => $userKnapsack['id']])->update($userKnapsackData);
                } else {
                    $userKnapsackData = [
                        'num' => $v,
                        'giftid' => $k,
                        'uid' => $userData['id'],
                        'createtime' => time()
                    ];
                    $userKnapsackInsert = Db::connect('db_qmconfig')->name('gift_knapsack')->insert($userKnapsackData);
                }
            }
　　　　　　　 ///增加用户消费记录
            $userXfData = [
                'uid' => $userData['id'],
                'xf_price' => $sendNum,
                'xf_method' => 5,
                'scene' => 19,
                'status' => 1,
                'ctime' => time()
            ];
            $userXf = Db::connect('db_qmconfig')->name('xfprice')->insert($userXfData);
            if ($desireLog && $userXf) {
　　　　　　　　　　///扣除用户金币
                $newDiamondsData = [
                    'diamonds' => $desireDiamonds['diamonds'] - $sendNum
                ];
                $newDiamonds = Db::connect('db_qmconfig')->name('user_money')->where(['uid' => $userData['id']])->update($newDiamondsData);
            }
　　　　　　　　

            if ($userRedis) {
                Cache::set('用户奖池名称' . $userData['id'], serialize($userRedis));
　　　　　　　　　 ////如果此轮抽奖抽到大奖 重置用户个人奖池
                if ($gift_height == 1) {
                    Cache::set('用户奖池名称' . $userData['id'], serialize([]));
                    $userChecksum = $res['zongshu']['checksum'] - ($res['zongshu']['user_num'] + $sendNum);
                    $desireLogUserWhere = [
                        'uid' => $userData['id'],
                        'giftid' => 0,
                        'num' => $userChecksum,
                        'ctime' => time(),
                        'cid' => $user_desire_log,
                    ];
　　　　　　　　　　　　///添加礼物抽中记录
                    $desireLogUser = Db::connect('db_qmconfig')->name('desire_log')->insert($desireLogUserWhere);
                }
                $swhere[] = ['d.state', '=', 1];
                $swhere[] = ['d.kind', '=', 1];
                $res['data'] = $this->giftInfo($swhere);
                if (empty($res['data'])) {
                    output('1008', '奖池更新中');
                }
　　　　　　　　　　////获取用户此轮抽奖数量 返回给前端 控制奖池动画百分比
                $res['zongshu'] = Db::connect('db_qmconfig')
                    ->name('desire')->where(['state' => 1, 'kind' => 1])
                    ->field('checksum as num')
                    ->find();
                $user = Db::connect('db_qmconfig')
                    ->name('desire_log')->where(['uid' => $userData['id']])
                    ->field('SUM(num) as num')
                    ->find();
                $res['diamonds'] = Db::connect('db_qmconfig')
                    ->name('user_money')->where(['uid' => $userData['id']])
                    ->value('diamonds');

                if ($user) {
                    if ($user['num'] > $res['zongshu']['num']) {
                        $res['zongshu']['user_num'] = $user['num'] % $res['zongshu']['num'];

                    } else {
                        $res['zongshu']['user_num'] = $user['num'];
                    }
                } else {
                    $res['zongshu']['user_num'] = 0;
                }
                $list['info'] = $res;
                return $list;
//                return ['msg'=>$res['zongshu']['user_num']];
            } else {
　　　　　　　　　　////如果当前用户奖池抽完奖了  那么重置此用户奖池
                $where[] = ['d.state', '=', 1];
                $where[] = ['d.kind', '=', 1];
                $res = $this->giftInfo($where);
                if (empty($res)) {
                    return ['msg' => '奖池更新中'];
                }
                $c = [];
                foreach ($res as $m => $n) {
　　　　　　　　　　///十抽必中奖品
                    if ($n['ten']==1){
                        $n['num'] = $n['num'] - $n['checksum']/10;
                        $giftarr = array_fill(0, $n['num']+$n['checksum']/10, $suiji['giftid']);
                        $c = array_merge($c, $giftarr);
                        if ($n['num']<=0){
                            continue;
                        }
                    }
　　　　　　　　　　　　///百抽必中奖品
                    if ($n['hundred']==1){
                        $n['num'] = $n['num'] - $n['checksum']/100;
                        $giftarr = array_fill(0, $n['num']+$n['checksum']/100, $suiji['giftid']);
                        $c = array_merge($c, $giftarr);
                        if ($n['num']<=0){
                            continue;
                        }
                    }
                    $giftarr = array_fill(0, $n['num'], $n['id']);
                    $c = array_merge($c, $giftarr);
                }
　　　　　　　　　　///随机打乱奖池
                shuffle($c);
                Cache::set('用户奖池名称' . $userData['id'], serialize($c));
                if ($newNum>0){
　　　　　　　　　　　　 ///递归此方法 抽剩下的奖品
                    return $this->draw($newNum);
                }
            }
        } else {
            ///如果没有奖池 生成奖池
            $where[] = ['d.state', '=', 1];
            $where[] = ['d.kind', '=', 1];
            $res = $this->giftInfo($where);
            if (empty($res)) {
                return ['msg' => '奖池更新中'];
            }
            $c = [];
            foreach ($res as $m => $n) {
                if ($n['ten']==1){
                    $n['num'] = $n['num'] - $n['checksum']/10;
                    $giftarr = array_fill(0, $n['num']+$n['checksum']/10, $suiji['giftid']);
                    $c = array_merge($c, $giftarr);
                    if ($n['num']<=0){
                        continue;
                    }
                }
                if ($n['hundred']==1){
                    $n['num'] = $n['num'] - $n['checksum']/100;
                    $giftarr = array_fill(0, $n['num']+$n['checksum']/100, $suiji['giftid']);
                    $c = array_merge($c, $giftarr);
                    if ($n['num']<=0){
                        continue;
                    }
                }
                $giftarr = array_fill(0, $n['num'], $n['id']);
                $c = array_merge($c, $giftarr);
            }
            shuffle($c);
            Cache::set('用户奖池名称' . $userData['id'], serialize($c));
　　　　　　　///递归此方法抽奖
            return $this->draw($num);
        }
    }
?>