Add support for generating MAY_BE_ARRAY_OF_REF func info flag (#7416)

Fix a few ext/date return types

Generate optimizer func info from stubs for ext/date (#7403)

Deprecate strftime() and gmstrftime()

These are deprecated in favor of date()/DateTime::format() (for
locale-indendent formatting) and IntlDateFormatter::format()
(for locale-depende

Deprecate strftime() and gmstrftime()

These are deprecated in favor of date()/DateTime::format() (for
locale-indendent formatting) and IntlDateFormatter::format()
(for locale-dependent formatting).

Part of https://wiki.php.net/rfc/deprecations_php_8_1.

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Deprecate date_sunrise() and date_sunset()

date_sunrise() and date_sunset() are deprecated in favor of
date_sun_info().

Part of https://wiki.php.net/rfc/deprecations_php_8_1.

Add support for tentative return types of internal methods

RFC: https://wiki.php.net/rfc/internal_method_return_types

Closses GH-6971

Implicitly enable function entry generation when class entry generation is enabled

Closes GH-6675

Generate class entries for a few extensions

Relates to GH-6644

Sync date_diff and DateTime::diff return type

This function/method cannot return false.

Fix return type of DateTimeImmutable::__set_state()

DateTime*::getOffset() no longer returns false as of PHP 8.0.0

Cf. <https://github.com/php/doc-en/pull/282>.

Closes GH-6539.

Revert "DateTime:: and DateTimeImmutable::getTimestamp() may return false"

This reverts commit b67c23218950eae0a153b093dcefbe14b3b40901.

DateTime:: and DateTimeImmutable::getTimestamp() may return false

Fix ext/date stubs

Closes GH-6523.

Require stubs to declare return types for magic methods when possible

Closes GH-6376

Verify parameter names of function aliases

Closes GH-6335

Improve parameter names in ext/intl

Closes GH-6309

Add some ValueErrors to ext/date

Closes GH-5613

Add another round of missing parameter types to stubs

Closes GH-5950

Last pass of 'More consistent parameter names for date/time functions'

Another pass of improving ext/date argument names

More consistent parameter names for date/time functions

Add missing param to DatePeriod::__construct()

The signature is very overloaded, but takes at most four params,
not three.

Introduce InternalIterator

Userland classes that implement Traversable must do so either
through Iterator or IteratorAggregate. The same requirement does
not exist for internal class

Introduce InternalIterator

Userland classes that implement Traversable must do so either
through Iterator or IteratorAggregate. The same requirement does
not exist for internal classes: They can implement the internal
get_iterator mechanism, without exposing either the Iterator or
IteratorAggregate APIs. This makes them usable in get_iterator(),
but incompatible with any Iterator based APIs.

A lot of internal classes do this, because exposing the userland
APIs is simply a lot of work. This patch alleviates this issue by
providing a generic InternalIterator class, which acts as an
adapater between get_iterator and Iterator, and can be easily
used by many internal classes. At the same time, we extend the
requirement that Traversable implies Iterator or IteratorAggregate
to internal classes as well.

Closes GH-5216.

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Convert UNKNOWN default values to null in ext/date

Closes GH-5509