Fix #78855: Native PHP types in database fetches

[oleg-st]

Added PSQL_TYPED flag for pg_fetch_array and pg_fetch_all functions to return native typed arrays.
Converting to native type is almost the same as in pdo_pgsql.

[zbenc]

@oleg-st What about the Postgres types float/real and double precision? Those can be safely converted to PHP float as Postgres uses IEEE 754, just like PHP (of course numeric/decimal must remain string in PHP).

[lubosdz]

Wish this could be done in mysqlnd. It would save lots of headaches, particularly since promoting features with strict typing.

[oleg-st]

@oleg-st What about the Postgres types float/real and double precision? Those can be safely converted to PHP float as Postgres uses IEEE 754, just like PHP (of course numeric/decimal must remain string in PHP).

Added floats.

[cmb69]

@oleg-st, since this is a new feature, and not a bug fix, it may only target PHP-7.4.

@lubosdz, feel free to provide a pull request. :)

[oleg-st]

@cmb69 PHP-7.4 is freezed for features, isn't it?

[villfa]

Could be replaced by --EXPECT--

[cmb69]

@oleg-st, this feature might be regarded as small and self-contained addition, and as such might be permissible for PHP-7.4. If not, the PR should target master. Anyway, IMO this cannot go into PHP-7.2. which the PR currently targets.

[oleg-st]

@villfa Done
@cmb69 I can do it this PR or should create new one?

[cmb69]

@oleg-st, you can change the base-branch of this PR.

[oleg-st]

Changed base branch to master

[cmb69]

@oleg-st, you also need to rebase onto master, and force push; otherwise CI won't work as expected (especially, AppVeyor).

Regarding the actual feature, it might be a good idea to write to the internals mailing list for visibility.

[oleg-st]

@cmb69 Rebased