Implement IntlGregorianCalendar::createFromDate() and IntlGregorianCalendar::createFromDateTime()

Revert "Merge branch 'PHP-8.2'"

This reverts commit 45a3f178dc226b69f5d72f10285bc2ad139b2c1c, reversing
changes made to b2a54bc6af4bf645b5bb2601621c12b31bfbff0c.

Narrow bool return types to true when possible

Declare ext/intl constants in stubs - part 11 (#9281)

Fix GH-7939: Cannot unserialize IntlTimeZone objects

As it is now, `IntlTimeZone`, `IntlCalendar` and `IntlDateFormatter`
and some other intl class instances can be serialized, but the

Fix GH-7939: Cannot unserialize IntlTimeZone objects

As it is now, `IntlTimeZone`, `IntlCalendar` and `IntlDateFormatter`
and some other intl class instances can be serialized, but the
representation is meaningless, and unserialization yields uninitialized/
unusable objects. To prevent users from noticing this too late, we deny
serialization of such objects in the first place.

Closes GH-7945.

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Add more specific array return type hints for various extensions - part 2

ext/ftp, ext/gmp, ext/intl

Closes GH-7433

Make IntlCalendar::roll() return type tentative

This method did not have a type in PHP 8.0 and is not final, so
the new return type should be tentative.

Backport some intl stub changes from master

While we're not sure under what circumstances they would fail,
they're fallible on the implementation level.

Declare tentative return types for ext/intl (#6986)

Improve class entry generation

Related to GH-6701

Generate ext/intl class entries from stubs

Closes GH-6670

Sync intlcal_create_instance() and IntlCalendar::createInstance()

Remove the explicit mention of IntlGregorianCalendar in the latter.
It is a subclass of IntlCalendar, and as such covere

Sync intlcal_create_instance() and IntlCalendar::createInstance()

Remove the explicit mention of IntlGregorianCalendar in the latter.
It is a subclass of IntlCalendar, and as such covered if only
IntlCalendar is used as the return type.

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Verify parameter names of function aliases

Closes GH-6335

Improve parameter names in ext/intl

Closes GH-6309

Add more precise type info for stubs

Closes GH-6005

Add another round of missing parameter types to stubs

Closes GH-5950

Warning to ValueError promotion in Intl extension Part 1

Affects:
- IntlCalendar
- IntlGregorianCalendar
- IntlBreakIterator

Closes GH-5669

Fix IntlGregorianCalendar constructor signature

Give these conversative UNKNOWN defaults and no types, as the
overload is something of a mess.

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necess

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necessary.

This ensures that release artifacts will never try to regenerate
stubs and thus fetch PHP-Parser, as long as you do not modify any
files.

Closes GH-5739.

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Generate method entries for ext/intl

Closes GH-5370

Store default parameter values of internal functions in arg info

Closes GH-5353. From now on, PHP will have reflection information
about default values of parameters of internal function

Store default parameter values of internal functions in arg info

Closes GH-5353. From now on, PHP will have reflection information
about default values of parameters of internal functions.

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>

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Do not include the same stub multiple times

Closes GH-5322

Revert "Replace @param annotations with type declarations"

This reverts commit c31029f335ca1b453af799805c43c37e959ad555.

Replace @param annotations with type declarations

Add stubs for IntlCalendar

Closes GH-4846