gmp_init Create GMP number resourcegmp_init mixednumber Creates a GMP number from an integer or string. String representation can be decimal or hexadecimal. In the latter case, the string should start with 0x. ]]> 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.