(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.
  
numPuò essere o una resource numero GMP, oppure una stringa numerica dal momento che è possibile convertire quest'ultimo in un numero.
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.
