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：
private function getUnsinInt($number)
{
$sql = "SELECT
CAST(
($number & 0xFFFFFFFF) AS UNSIGNED INTEGER
) as uns_int;";
$res = pdo_fetch($sql);
return $res[‘uns_int‘];
}原文：https://www.cnblogs.com/smilem/p/13169962.html