bcpow 和 pow 有什么区别？
有人可以向我解释一下我是否应该使用 bcpow() 而不是 pow() 以及为什么？
据我了解，并非所有 php 安装都启用了 bcmath。因此，如果我编写一个开源项目，并且希望拥有尽可能少的依赖项/要求，我宁愿在代码中使用 pow() 。
但是使用 pow() 相对于 bcpow() 有何缺点？
Can someone explain to me if I should use bcpow() instead of pow() and why?
I understand that not all installations of php have bcmath enabled. So if I write an open source project, and want to have as few dependencies/requirements as possible, I would rather use pow() in my code.
But what are the downsides to using pow() over bcpow()?
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bcpow()是BCMath 任意精度数学 库。引用它的手册的介绍：
On the other hand, [**`pow()`**][3] is limited to [floats][4], which have a limited size *(quoting)* :
Generally, you'll work with `pow()` and other float-based functions *(which are probably faster, and are always enabled)* ; but, if you need to handle very big number, you'll have to work with `bcpow()`.
bcpow()is a function of the BCMath Arbitrary Precision Mathematics library.Quoting the introduction of it's manual :
On the other hand, [**`pow()`**][3] is limited to [floats][4], which have a limited size *(quoting)* :
Generally, you'll work with `pow()` and other float-based functions *(which are probably faster, and are always enabled)* ; but, if you need to handle very big number, you'll have to work with `bcpow()`.
根据 手册 的
bc*功能是pow()仅限于其运行的系统上支持的最大数字表示形式。According to the manual the
bc*functions arepow()is limited to the maximum supported numeric representation on the system it runs on.bcpow用于任意精度值。作为第三个参数，您可以指定逗号后的位数。bcpowis used for arbitrary precision values. As a third parameter you can specify a number of digits after coma.