PHP Manual . Prev . Next . PHP 4 >= 4.0.4) gmp_init -- Create GMP number . resource gmp_init ( mixed number) . Creates a GMP number from an integer or string. ... Note: It is not necessary to call this function if you want to use integer or string in place of GMP number in GMP functions, like gmp_add() . Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as gmp_init() . ... GMP functions . ...