在 PHP 中使用任意精度库进行舍入
I asked a question earlier about how to deal with rounding issues with floating point numbers in PHP, and was pointed to the bc and gmp libraries.
I've looked at the functions in these libraries but nothing jumped out at me when I was looking for one to round off the number.
How do you accurately round using these libraries?
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在如何对bcmath数字进行向上取整、向下取整和四舍五入？，答案为您提供了
bcround函数的实现，它利用了自己的bcfloor和bcceil函数，这似乎可以工作。作为测试，这是您在评论中要求的内容。
In How to ceil, floor and round bcmath numbers?, the answer gives you an implementation of
bcroundfunction, which utilizes its ownbcfloorandbcceilfunction which seems to work.As a test, here is what you asked for in your comment.