Implement zend_hash_add_empty_element() using the existing infrastructure

Initialize empty pDataPtr to a pseudo value to prevent a pefree on
pData.

Some extensions don't associate any data with hash entries,
except the key. Prior to this change, a separate chunk of memory
was allocated in that case to store exactly zero bytes (plus

Some extensions don't associate any data with hash entries,
except the key. Prior to this change, a separate chunk of memory
was allocated in that case to store exactly zero bytes (plus
memory manager overhead). We treat that case similar to the
pointer case, but don't copy any data at all (because the pointer
is usually the NULL pointer).

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include limits.h if available

- More whitespace fixes while I'm at it.

- Update copyright year

Allow get_current_key() not to return the key itself, instead of a duplicate

@* Fixed a possible crash in get_class_methods() (Zeev)

INIT_DATA/UPDATE_DATA assumed that pData elements of the size of a void
pointer would actually be aligned like a void pointer. This lead
to bus errors on architectures which don't allow unali

INIT_DATA/UPDATE_DATA assumed that pData elements of the size of a void
pointer would actually be aligned like a void pointer. This lead
to bus errors on architectures which don't allow unaligned 32-bit accesses.

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Don't use 'new' symbol

Add zend_hash_merge_ex(), for selective merging

- Another has optimization/fix like the hash_copy one from earlier on

Make hash_copy call copy constructor on a real copy, not on a temp

This is probably the oldest bug in PHP :)
Luckily it's unlikely we're ever actually bitten by this bug.

Disable the hash_apply() protection on hashes that persist across requests - it's unsafe
because we may be aborted at any point

Avoid crashing with recursive applies - limit apply nest level to 3 (I'm not aware of a place
in which applying recursively on the same hash makes sense with more than one nest level, but
3 s

Avoid crashing with recursive applies - limit apply nest level to 3 (I'm not aware of a place
in which applying recursively on the same hash makes sense with more than one nest level, but
3 should be enough)

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- Support unordered hash comparisons
- Make == perform an unordered comparison with arrays/objects, and === perform an ordered comparison

Support comparisons of arrays (with arrays) and objects (with objects)

- Fix Win32 compilation (Use winsock2.h from now on)
- Add lambda() support

Change zend_hash_get_current_key_ex() to also return the string length

- Nuke hash_*_ptr functions

Make zend_hash_move_forward()/zenv_hash_move_backwards() a little smarter.

Introduced a way to traverse hashes through external pointers.

It's official now...

(c) patch