Remove depreacted curly brace offset syntax

Closes GH-5221

Add support for the mixed type

RFC: https://wiki.php.net/rfc/mixed_type_v2
Closes GH-5313

Co-authored-by: Dan Ackroyd <danack@basereality.com>

Fix bug #79603, by retrying on RTD key collision

This is a non-intrusive fix for 7.4, still trying to find a good
solution for master.

Closes GH-5597.

Use zend_zval_type_name() API where possible

Rather than zend_get_type_by_const(Z_TYPE_P()).

Make numeric operations on resources, arrays and objects type errors

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

Closes GH-5331.

Completely remove disabled functions from function table

Currently, disabling a function only replaces the internal
function handler with one that throws a warning, and a few
places

Completely remove disabled functions from function table

Currently, disabling a function only replaces the internal
function handler with one that throws a warning, and a few
places in the engine special-case such functions, such as
function_exists. This leaves us with a Schrödinger's function,
which both does not exist (function_exists returns false) and
does exist (you cannot define a function with the same name).
In particular, this prevents the implementation of robust
polyfills, as reported in https://bugs.php.net/bug.php?id=79382:

if (!function_exists('getallheaders')) {
function getallheaders(...) { ... }
}

If getallheaders() is a disabled function, this code will break.

This patch changes disable_functions to remove the functions from
the function table completely. For all intents and purposes, it
will look like the function does not exist.

This also renders two bits of PHP functionality obsolete and thus
deprecated:

* ReflectionFunction::isDisabled(), as it will no longer be
possible to construct the ReflectionFunction of a disabled
function in the first place.
* get_defined_functions() with $exclude_disabled=false, as
get_defined_functions() now never returns disabled functions.

Fixed bug #79382.

Closes GH-5473.

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Check `__set_state` structure

Fix Bug #79521.

Closes GH-5462.

Slipt error messages while checking magic methods attributes

Closes GH-5465

Avoid throw expression leaks

Mark "throw" used in expression context with a flag, and don't
treat it as a BB terminator in that case. This prevents us from
optimizing away the follow

Avoid throw expression leaks

Mark "throw" used in expression context with a flag, and don't
treat it as a BB terminator in that case. This prevents us from
optimizing away the following opcodes as unreachable, which may
result in live ranges being dropped incorrectly.

Close GH-5450.

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Pass existing lcname to check_magic_method_implementation

Add case insensitive find_ptr hash functions

- zend_hash_find_ptr_lc(ht, zend_string *key)
- zend_hash_str_find_ptr_lc(ht, const char *str, size_t len)

Note that zend_hash_str

Add case insensitive find_ptr hash functions

- zend_hash_find_ptr_lc(ht, zend_string *key)
- zend_hash_str_find_ptr_lc(ht, const char *str, size_t len)

Note that zend_hash_str_find_ptr_lc used to exist in zend_compile.c
as zend_hash_find_ptr_lc. When exporting this I figured it
was best to use the same conventions as the rest of zend_hash.h.

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Check Serialization magic methods structure

Closes GH-5441

Use zend_make_tmp_result() helper in more places

Accept result znode in zend_compile_class_decl()

Make this use the same pattern we use everywhere else.

Use return in compile_expr for consistency

Make throw statement an expression

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

This has an open issue with temporaries that are live at the time
of the throw being leaked. La

Make throw statement an expression

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

This has an open issue with temporaries that are live at the time
of the throw being leaked. Landing this now for easier testing and
will revert if we cannot resolve the issue.

Closes GH-5279.

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Remove ZEND_ACC_DTOR flag

This is only used in reflection, where doing a simple string check
is acceptable.

I'm also dropping the "dtor" printing in the reflection dump.
Dto

Remove ZEND_ACC_DTOR flag

This is only used in reflection, where doing a simple string check
is acceptable.

I'm also dropping the "dtor" printing in the reflection dump.
Dtors are just one of many magic methods, I don't think there's
a point in explicitly highlighting them, when the name is already
unambiguous.

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Fix magic method name

Improve error messages for magic methods by appending method's class

Closes GH-5397.

Add zend_string_concat2 API

Add zend_create_member_string() API

This is a recurring pattern.

Export the zend_string_concat3() API

Make division by zero error check more accurate

For division (rather than modulus) we should check the double
value, otherwise the result might be zero after integer truncation,
but

Make division by zero error check more accurate

For division (rather than modulus) we should check the double
value, otherwise the result might be zero after integer truncation,
but not zero as a floating point value.

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Unify checks for binary operator errors for ct eval

Move everything into one function and share it with opcache.
This fixes some discrepancies.

Check abstract method signatures coming from traits

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

Closes GH-5068.