Add intadd function

[adsr]

Useful for when integer overflow is desired instead of becoming a float.

Synopsis:

php > var_dump(PHP_INT_MAX + 1);
float(9.223372036854776E+18)
php > var_dump(intadd(PHP_INT_MAX, 1));
int(-9223372036854775808)

Can write an RFC if desired.

(Requesting hacktoberfest-accepted label for Hacktoberfest cred.)

[juan-morales]

Hello @adsr

Can write an RFC if desired.

is not desired, in your case ... is a must I would say.

[bwoebi]

Looks good to me

[juan-morales]

@bwoebi Hello.

I Am curious about your approval on the PR what Does it mean?

This is just to know More about the process in PHP contribution.

[iluuu1994]

Signed integer overflow is undefined, this should be converted to unsigned (and back).

[cmb69]

IMO, this needs at least discussion on the internals mailing list. Personally, I'm not in favor of this, unless we'd implement full support for all operators (e.g. multiplication). And even then, I almost never find overflow behavior reasonable, and would rather prefer an exception (or way better, bigint support).

[juan-morales]

I agree with @cmb69

[devnexen]

Let's see what people think on the list but that s a no for me, usually I appreciate new ideas, but I m not liking this one.

[krakjoe]

I'm closing this because I think it's misleading to leave it open, nobody can act on this without an RFC and the RFC never materialized in nearly three years.

If I'm wrong and there was substantial discussion that resolved the things raised here, or you intend to write a formal RFC, feel free to re-open targeting the current master branch (there are conflicts).