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| <?php namespace app\controller;
use app\BaseController;
class Seckill extends BaseController {
protected $id;
protected $redis;
protected $stock_key;
protected $stock_get_key;
protected $config = [ 'start_time' => '2022-05-10 22:00:00', 'end_time' => '2022-05-11 22:00:00', ];
public function __construct() { $this->redis = new \Predis\Client('tcp://IP:端口', [ 'parameters' => [ 'password' => '密码', ], ]);
$this->id = (int) input('id', 1);
if($this->id < 1) { $this->id = 1; }
$this->stock_key = sprintf('%s:stock:%d', 'Seckill', $this->id);
$this->stock_get_key = sprintf('%s:stock_get:%d', 'Seckill', $this->id); }
public function index() { $uid = random_int(1, 10000 * 10000);
if(time() < strtotime($this->config['start_time'])) { return '秒杀未开启'; }
if(time() > strtotime($this->config['end_time'])) { return '秒杀已结束'; }
$eval = <<<LUA -- 获取用户是否存在记录 local has_get = redis.call('hexists', KEYS[2], KEYS[3])
if(has_get == 1) then -- 存在参与记录则无法重复参与 return -1 end
-- 先减少库存 local stock = redis.call('decr', KEYS[1])
if(stock < 0) then -- 已无库存 return -2 end
-- 增加参与记录 local result = redis.call('hsetnx', KEYS[2], KEYS[3], redis.call('time')[1])
if(result == 1) then -- 插入成功 return 1 else -- 插入失败 redis.call('incr', KEYS[1]) return 0 end
-- 异常兜底 return -99 LUA;
try { $value = (int) $this->redis->eval($eval, 3, $this->stock_key, $this->stock_get_key, $uid); } catch (\Exception $e) { return '系统异常'; }
if($value === -1) { return '无法重复参与'; } else if($value === -2) { return '已售罄'; } else if($value < 0) { return '系统异常'; } else if($value === 0) { return '重试'; }
return '领取成功'; }
public function init() { $value = pow(2, 16);
$this->redis->setnx($this->stock_key, $value);
return '1'; } }
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