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

//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);

}

}

?>

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