PHP 使用redis set锁

const LOCKRSETUSR = 'lockuser';

const SETNXKEYS = 'user_nx_%s'; 

const NOT_FREQUENT_OPERATION = '请勿频繁操作，请等待%s s';

//防刷:防止重复刷新页面，加锁随机码产生变动无法解锁
        $setnxkeys = sprintf(self::SETNXKEYS,$edata['uid']); //$data['uid'] 操作用户的uid
        if($this->redis->exists($setnxkeys)) {
            $ttlsecond = sprintf(self::NOT_FREQUENT_OPERATION,$this->redis->ttl($setnxkeys));
            returnJson(['status' =>0, 'msg' => $ttlsecond]);
        }else{
            $this->redis->set($setnxkeys, 1, 7);
        }

　　

//加锁

$token = rand(1, 100000);
$locksetkey = $this->redis->lockset(self::LOCKRSETUSR, $token);

//解锁
$this->redis->unlockset(self::LOCKRSETUSR, $token);

具体redis类方法

加锁

public function lockset($cachekey, $value, $expire_time=6) {
         return $this->handler->set($cachekey, $value, ['NX', 'EX'=>$expire_time]);
     }

 解锁：

public function unlockset($cachekey,$token) {
        
        $script = 'if redis.call("get",KEYS[1]) == ARGV[1]
        then
            return redis.call("del",KEYS[1])
        else
            return 0
        end';
        return $this->handler->eval($script, [$cachekey, $token],1);

}

PHP中使用redis执行lua脚本示例

$this->handler->eval($script, [$cachekey, $token],1);

eval "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}" 2 key1 key2 first second

解释： "return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}" 是被求值的 Lua 脚本，数字 2 指定了键名参数的数量， key1 和 key2 是键名参数，
分别使用 KEYS[1] 和 KEYS[2] 访问，而最后的 first 和 second 则是附加参数，可以通过 ARGV[1] 和 ARGV[2] 访问它们。

PHP中使用redis拓展执行脚本时，eval方法的参数 3个，第一个是脚本代码，第二个是一个数组，参数数组，第三个参数是个整数，表示第二个参数中的前几个是key参数，剩下的都是附加参数

 

实际案例：

　　 const NO_DATA                = '参数不能为空!';
    const NO_COMMEM_TCONTENT     = '内容不能为空!';
    const NOT_LOGIN              = '请登录!';
    const NOT_FREQUENT_OPERATION = '请勿频繁操作，请等待%s s';
    const SETNXKEYS              = 'user_nx_%s';
    const LOCKRSETUSR            = 'lockuser';

　　

/**
     * 抽奖接口
     * @Author   方法
     * @DateTime 2020-01-14T10:50:02+0800
     * @param
     * @return   [type]                   [description]
     */
    public function lucky()
    {
        $post_params = [
            ['type' => 'int', 'name' => "uid"], //用户id
            ['type'=>'string','name'=>"loginId"],//logid
        ];
        
        if (!$this->request->post("data")) {
            returnJson(['status' => LuckyDrawSevice::STATUS_EROOR, 'result' => 0, 'msg' => self::NO_DATA],$this->client_refer);
        }
        $edata = postEmpty($this->request->post('data'), $post_params,$this->client_refer);
        if(empty($edata['uid']) || empty($edata['loginId'])) {
        returnJson(['status' => LuckyDrawSevice::STATUS_EROOR,'result' => 0, 'msg' => self::NOT_LOGIN],$this->client_refer);
        } else {
        UserAuth($edata['uid'], $edata['loginId']);
        }

        //防刷:防止重复刷新页面，加锁随机码产生变动无法解锁
        $setnxkeys = sprintf(self::SETNXKEYS, $edata['uid']);
        if ($this->redis->exists($setnxkeys)) {
            $ttlsecond = sprintf(self::NOT_FREQUENT_OPERATION, $this->redis->ttl($setnxkeys));
            returnJson(['status' => LuckyDrawSevice::STATUS_EROOR,'result' => 0, 'msg' => $ttlsecond],$this->client_refer);
        } else {
            $this->redis->set($setnxkeys, 1, 1); // 设置用于id key值
        }

        //加锁
        $token      = rand(1, 100000);
        $locksetkey = $this->redis->lockset(self::LOCKRSETUSR, $token);
        if ($locksetkey) {
          
            $whether_to_win = $this->luckysevice->luckyJudge($edata);
            try {

                if (!$whether_to_win['status']) {
                    //解锁
                    $this->redis->unlockset(self::LOCKRSETUSR, $token);
                    returnJson(['status' => LuckyDrawSevice::STATUS_EROOR,'result' => 0, 'msg' => $whether_to_win['msg']],$this->client_refer);
                } else {
                    $isrecordwhere = ['uid' => $edata['uid'], 'is_deleted' => 0];
                    $isrecorduser  = Db::table('lucky_user_raffle_record')->where($isrecordwhere)->find();
                    $userreal      = Db::table('user')->where('id', $edata['uid'])->field('real_name,certificate')->find();
                    $recordarr     = [
                        'uid'         => $edata['uid'],
                        'real_name'   => $userreal['real_name'],
                        'certificate' => $userreal['certificate'],
                    ];
                    $uprecod = '';
                    //中奖奖品个数加1
                    if ($whether_to_win['result']) {

                        if ($whether_to_win['result'] < 6) {
                            $recordarr['prize_name'] = $whether_to_win['result'];
                            $bigprises               = 'num_awards';
                        } else {
                            $bigprises = 'num_lucky_awards';
                        }
                       
                        if (!empty($isrecorduser)) {
                            $recordarr[$bigprises] = $isrecorduser[$bigprises] + 1;
                            $uprecod               = Db::table('lucky_user_raffle_record')->where($isrecordwhere)->update($recordarr);
                            if(!$uprecod) {
                                 Db::rollback();
                                 returnJson(['status' => LuckyDrawSevice::STATUS_EROOR, 'result' => 0, 'msg' => '抽奖失败'],$this->client_refer);
                            }
                        } else {
                            $recordarr[$bigprises] = 1;
                            $uprecod   = Db::table('lucky_user_raffle_record')->insert($recordarr);
                            if(!$uprecod) {
                                 Db::rollback();
                                 returnJson(['status' => LuckyDrawSevice::STATUS_EROOR, 'result' => 0, 'msg' => '抽奖失败'],$this->client_refer);
                            }
                        }
                        if (isset($recordarr['prize_name'])) {
                            unset($recordarr['prize_name']);
                        }
                        unset($recordarr[$bigprises]);

                    }
                    $recordarr['raffle_records'] = $whether_to_win['result'];
                    //加入日志表
                    $insertrecod = Db::table('lucky_user_lottery_log')->insert($recordarr);

                    if ($insertrecod) {
                        Db::commit();
                        returnJson(['status' => LuckyDrawSevice::STATUS_SUCESS, 'result' => $whether_to_win['result'], 'msg' => '抽中' . $whether_to_win['result'] . '等奖'],$this->client_refer);
                    } else {
                        Db::rollback();
                        returnJson(['status' => LuckyDrawSevice::STATUS_EROOR, 'result' => 0, 'msg' => '抽奖失败'],$this->client_refer);
                    }
                    //解锁
                    $this->redis->unlockset(self::LOCKRSETUSR, $token);
                }
            } catch (Exception $e) {
                Db::rollback();
                //解锁
                $this->redis->unlockset(self::LOCKRSETUSR, $token);
                returnJson(['status' => LuckyDrawSevice::STATUS_EROOR, 'result' => 0, 'msg' => $e->getMessage()],$this->client_refer);
            }
        }else{
             returnJson(['status' => LuckyDrawSevice::STATUS_EROOR,'result' => 0, 'msg' => '请稍后再试'],$this->client_refer);
        }

    }