Migrate to PHP-Parser 4.12.0 and regenerate some arginfos

Actually, abstract methods don't have a body

Fix some smaller formatting inconsistencies in stubs

Declare tentative return types in ext/spl - part 3 (#7239)

Merge branch 'PHP-8.0'

* PHP-8.0:
Fix some more ext/spl return types

Fix some more ext/spl return types

Closes GH-7242

Revert "IteratorIterator::getInnerIterator() can't return null"

This reverts commit c252420d0842b1f7ea3891695bb6de3c9ec9a57c.

This (currently) does not hold for invalid AppendIterat

Revert "IteratorIterator::getInnerIterator() can't return null"

This reverts commit c252420d0842b1f7ea3891695bb6de3c9ec9a57c.

This (currently) does not hold for invalid AppendIterators,
revert for now.

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IteratorIterator::getInnerIterator() can't return null

If ther IteratorIterator is initialized (which we check), then
zobject cannot be undef and the return value cannot be null.

Merge branch 'PHP-8.0'

Various ext/spl stub fixes

Closes GH-7215

Use typed property in RegexIterator

Generate ext/spl class entries from stubs

Closes GH-6709

Add support for generating class entries from stubs

Closes GH-6289

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

Update ext/spl parameter names

Closes GH-6284.

Fix a few Iterator signatures

Closes GH-6176

Add support for `@implementation-alias` in stubs

Closes GH-6170

Add more precise type info for stubs

Closes GH-6005

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 methods entries from stubs for ext/spl

Closes GH-5458

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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Add stubs for SPL iterators

Closes GH-5286