替代PHP格式化成无符号数后精度不对问题

PHP对于无符号数，数据较大时，格式化会出现差1或2的情况，替代办法用mysql来计算结果
实例代码如下：

    function getUnsinInt($number)
    {
        $sql = "SELECT
    CAST(
        ($number & 0xFFFFFFFF) AS UNSIGNED INTEGER
    ) as uns_int;";
        $res = pdo_fetch($sql);
        return $res['uns_int'];
    }