(PHP 5 >= 5.6.0, PHP 7, PHP 8)
gmp_rootrem — Take the integer part and remainder of nth root
Takes the nth root of num and
returns the integer component and remainder of the result.
num
A GMP object, an int,
or a string that can be interpreted as a number following the same logic
as if the string was used in gmp_init() with automatic
base detection (i.e. when base is equal to 0).
nth
The positive root to take of num.
A two element array, where the first element is the integer component of the root, and the second element is the remainder, both represented as GMP numbers.