Fix `WeakMap` object reference offset causing `TypeError` (#8995)

Fix use after free when WeakMap is modified during field write

(When a value's destructor triggers a resizing or rehashing of the WeakMap)

Closes GH-7671

Fix WeakReference uniquing is TAG_HT is used

Add ZEND_API for weakmap functionality via zend_weakrefs_hash_add/del

Closes GH-7600.

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functio

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functions which return true/false (1/0)
Use zend_result return type for functions which return SUCCESS/FAILURE as they don't follow normal boolean semantics

Closes GH-6002

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Allow removing non-existing key from WeakMap

In line with usual PHP semantics. This previously triggered an
assertion failure.

Fix use-after-free is WeakMap key and value are the same

Drop the object from the WeakMap as the last step, as this might
end up destroying the object.

Fix warnings of strict-prototypes

Closes GH-5887.

Review the usage of apostrophes in error messages

Closes GH-5590

Add get_gc handle for object iterators

Optional handler with the same semantics as the object handler.

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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Add flag to forbid dynamic property creation on internal classes

While performing resource -> object migrations, we're adding
defensive classes that are final, non-serializable and non-c

Add flag to forbid dynamic property creation on internal classes

While performing resource -> object migrations, we're adding
defensive classes that are final, non-serializable and non-clonable
(unless they are, of course). This path adds a ZEND_ACC_NO_DYNAMIC_PROPERTIES
flag, that also forbids the creation of dynamic properties on these objects.
This is a subset of #3931 and targeted at internal usage only
(though may be extended to userland at some point in the future).

It's already possible to achieve this (what the removed
WeakRef/WeakMap code does), but there's some caveats: First, this
simple approach is only possible if the class has no declared
properties, otherwise it's necessary to special-case those
properties. Second, it's easy to make it overly strict, e.g. by
forbidding isset($obj->prop) as well. And finally, it requires a
lot of boilerplate code for each class.

Closes GH-5572.

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Add ZVAL_OBJ_COPY macro

For the common ZVAL_OBJ + GC_ADDREF pattern.
This mirrors the existing ZVAL_STR_COPY API.

Generate method entries from stubs for Zend classes

Closes GH-5459

Implement WeakMap

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

Add missing ZPP checks

Closes GH-4878.

Add stubs for WeakReference

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Better hot/cold code splitting

Fix weakref object handlers for master

zend_weakrefs