The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
GMP_ROUND_ZERO (int)GMP_ROUND_PLUSINF (int)GMP_ROUND_MINUSINF (int)GMP_MSW_FIRST (int)GMP_LSW_FIRST (int)GMP_LITTLE_ENDIAN (int)GMP_BIG_ENDIAN (int)GMP_NATIVE_ENDIAN (int)GMP_VERSION (string)GMP_MPIR_VERSION (string)