Implement enums

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

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

Closes GH-6489.

Explicitly print reference wrappers in debug_zval_dump()

Closes GH-6750.

Optimize serializing class names

Because of the memcpy, compilers can't infer that ZSTR_LEN (i.e. class_name->len)
did not change, so they copy it out of memory into a register for the l

Optimize serializing class names

Because of the memcpy, compilers can't infer that ZSTR_LEN (i.e. class_name->len)
did not change, so they copy it out of memory into a register for the last two
accesses.
php_var_serialize_string already does something similar.

Closes GH-6734

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Optimized object serialization without rebulding properties HashTable

Incomplete class may have only single "MAGIC_MEMBER"

serialize() optimization

Speed up __sleep() and __wakeup() calls

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool is retained as an alias.

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Print "interned" instead of fake refcount in debug_zval_dump()

debug_zval_dump() currently prints refcount 1 for interned strings
and arrays, which does not really reflect the truth. The

Print "interned" instead of fake refcount in debug_zval_dump()

debug_zval_dump() currently prints refcount 1 for interned strings
and arrays, which does not really reflect the truth. These values
are not refcounted, so the refcount is misleading. Instead print
an "interned" tag.

Closes GH-6598.

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Make convert_to_*_ex simple aliases of convert_to_*

Historically, the _ex variants separated the zval first, if a
conversion was necessary. This distinction no longer makes sense
sin

Make convert_to_*_ex simple aliases of convert_to_*

Historically, the _ex variants separated the zval first, if a
conversion was necessary. This distinction no longer makes sense
since PHP 7.

The only difference that was still left is that _ex checked whether
the type is the same first, but the usage of these macros did not
actually distinguish on whether such an inlined check is valuable
or not in a given context.

Also drop the unused convert_to_explicit_type macros.

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Remove some INDIRECT handling in standard library

Fix edge case serializing __PHP_Incomplete_Class properties.

This was using strcmp instead of zend_string_equals_literal.
As a result, the property count didn't match the number of prope

Fix edge case serializing __PHP_Incomplete_Class properties.

This was using strcmp instead of zend_string_equals_literal.
As a result, the property count didn't match the number of properties
being serialized if properties started with
"__PHP_Incomplete_Class\0" (unlikely)

(before, `'O:8:"Missing_":1:{}'` would be serialized, which failed to
unserialize)

Everywhere else expects the MAGIC_MEMBER to match exactly,
and this should use zend_string_equals_literal as an example for other code.

This has used strcmp since 2004 in deb84befae4bbc3686a4f2ed82b04e2cabae5dc0

Closes GH-6555

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Merge branch 'PHP-7.4' into PHP-8.0

* PHP-7.4:
Fixed bug #80411

Fixed bug #80411

References to null-serializations are stored as null, and as such
are part of the reference count.

Reminds me that we really need to deprecate the mess that is

Fixed bug #80411

References to null-serializations are stored as null, and as such
are part of the reference count.

Reminds me that we really need to deprecate the mess that is
Serializable.

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Promote a few remaining errors in ext/standard

Closes GH-6110

[RFC] Only unserialize Phar metadata when getMetadata() is called

In other words, don't automatically unserialize when the magic
phar:// stream wrappers are used.
RFC: https://wiki.p

[RFC] Only unserialize Phar metadata when getMetadata() is called

In other words, don't automatically unserialize when the magic
phar:// stream wrappers are used.
RFC: https://wiki.php.net/rfc/phar_stop_autoloading_metadata

Also, change the signature from `getMetadata()`
to `getMetadata(array $unserialize_options = [])`.
Start throwing earlier if setMetadata() is called and serialization threw.

See https://externals.io/message/110856 and
https://bugs.php.net/bug.php?id=76774

This was refactored to add a phar_metadata_tracker for the following reasons:
- The way to properly copy a zval was previously implicit and undocumented
(e.g. is it a pointer to a raw string or an actual value)
- Avoid unnecessary serialization and unserialization in the most common case
- If a metadata value is serialized once while saving a new/modified phar file,
this allows reusing the same serialized string.
- Have as few ways to copy/clone/lazily parse metadata (etc.) as possible,
so that code changes can be limited to only a few places in the future.
- Performance is hopefully not a concern - copying a string should be faster
than unserializing a value, and metadata should be rare in most cases.

Remove unnecessary skip in a test(Compression's unused)

Add additional assertions about usage of persistent phars

Improve robustness of `Phar*->setMetadata()`

- Add sanity checks for edge cases freeing metadata, when destructors
or serializers modify the phar recursively.
- Typical use cases of php have phar.readonly=1 and would not be affected.

Closes GH-5855

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Fix warnings of strict-prototypes

Closes GH-5887.

debug_zval_dump(): Don't skip recursion detection on first level

A complement to ae6f45ad45e072260d93f828d81fee9548123044

Closes GH-5843.

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed BC break of php_debug_zval_dump

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fixed BC break of php_debug_zval_dump

Fixed BC break of php_debug_zval_dump

It introduced by fixing bug #79830

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #79830 introduced by fixing bug #79821

# Conflicts:
# ext/standard/var.c

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fixed bug #79830 introduced by fixing bug #79821

Fixed bug #79830 introduced by fixing bug #79821

This also fixes memory error in debug_zval_dump and var_export.

Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed bug #79821