Take the integer part of nth root

PHP Manual
GMP 函式
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

說明

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

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

參數

num: GMP 對像或 int ，或數字string。
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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