Take the integer part of nth root

# gmp_root

(PHP 5 >= 5.6.0, PHP 7, PHP 8)

gmp_root — Take the integer part of nth root

### 说明

function gmp_root(GMP|int|string `$num`, int `$nth`): GMP

Takes the `nth` root of `num` and returns the integer component of the result.

### 参数

`num`
  GMP 对象、int 或 string，可以按照跟在 gmp_init() 中使用字符串并自动检测 base（即当 base 等于 0 时）相同的逻辑将其解释为数字。
`nth`

  The positive root to take of `num`.

### 返回值

The integer component of the resultant root, as a GMP number.

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