Redis使用Eval多个键值自增的操作实例

在PHP上使用Redis 给多个键值进行自增，示例如下：

$set["money"] = $this->redis->hIncrByFloat（$key, $hour ."_money", $data["money"]）;$set["ip"] = $this->redis->hIncrBy（$key, $hour ."_ip", $data["ip"]）;$set["uv"] = $this->redis->hIncrBy（$key, $hour ."_uv", $data["uv"]）;$set["pv"] = $this->redis->hIncrBy（$key, $hour ."_pv", $data["pv"]）;$this->redis->hSet（$key, $hour, array（$data["money"], $data["ip"], $data["uv"], $data["pv"]））;

如果这样写可能需要请求五次，可以通过 Eval 方法来一次完成，大大提高效率

$script = "local money = redis.call（"hIncrByFloat", KEYS[1], ARGV[1], ARGV[2]）;";$script .= "local ip = redis.call（"hIncrBy", KEYS[1], ARGV[3], ARGV[4]）;";$script .= "local uv = redis.call（"hIncrBy", KEYS[1], ARGV[5], ARGV[6]）;";$script .= "local pv = redis.call（"hIncrBy", KEYS[1], ARGV[7], ARGV[8]）;";$script .= "local val = money ..",".. ip ..",".. uv ..",".. pv;";$script .= "redis.call（"hSet", KEYS[1], ARGV[2], val）;";$script .= "return val;";$result = $this->redis->evaluate（$script, [$key, $hour, $hour ."_money", $data["money"], $hour ."_ip", $data["ip"], $hour ."_uv", $data["uv"], $hour ."_pv", $data["pv"]], 2）;var_dump（$result）;

Redis 用的 Lua 语法，我也不熟悉，这个字符串拼接方式也很特别的是两个点号 “..”

money ..",".. ip ..",".. uv ..",".. pv拼接后0.01,1,2,3

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