Pchp.Library.Arrays.array_sum C# (CSharp) Method

        public static PhpNumber array_sum(PhpArray array)
        {
            if (array == null)
            {
                //PhpException.ArgumentNull("array");
                //return 0.0;
                throw new ArgumentNullException(nameof(array));
            }

            if (array.Count == 0)
            {
                return PhpNumber.Default;
            }

            PhpNumber result = PhpNumber.Default;
            PhpNumber num;

            var iterator = array.GetFastEnumerator();
            while (iterator.MoveNext())
            {
                iterator.CurrentValue.ToNumber(out num);
                result += num;
            }

            //
            return result;
        }