Consolidate new union type ZPP macro names

They will now follow the canonical order of types. Older macros are
left intact due to maintaining BC.

Closes GH-6112

Add more precise type info for stubs

Closes GH-6005

Fixed bug #79946

Declare __STDC_CONSTANT_MACROS and __STDC_FORMAT_MACROS via -D
to make sure they are declared before the first stdint.h include.
We also define these in php_stdint.h

Fixed bug #79946

Declare __STDC_CONSTANT_MACROS and __STDC_FORMAT_MACROS via -D
to make sure they are declared before the first stdint.h include.
We also define these in php_stdint.h, but don't always include that
file first.

This is necessary for old compilers that use C99 rather than C11
semantics for stdint.h.

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Warning to ValueError promotion in Intl extension Part 1

Affects:
- IntlCalendar
- IntlGregorianCalendar
- IntlBreakIterator

Closes GH-5669

Add zend_call_known_function() API family

This adds the following APIs:

void zend_call_known_function(
zend_function *fn, zend_object *object, zend_class_entry *called_scope

Add zend_call_known_function() API family

This adds the following APIs:

void zend_call_known_function(
zend_function *fn, zend_object *object, zend_class_entry *called_scope,
zval *retval_ptr, int param_count, zval *params);

void zend_call_known_instance_method(
zend_function *fn, zend_object *object, zval *retval_ptr, int param_count, zval *params);
void zend_call_known_instance_method_with_0_params(
zend_function *fn, zend_object *object, zval *retval_ptr);
void zend_call_known_instance_method_with_1_params(
zend_function *fn, zend_object *object, zval *retval_ptr, zval *param);
void zend_call_known_instance_method_with_2_params(
zend_function *fn, zend_object *object, zval *retval_ptr, zval *param1, zval *param2);

These are used to perform a call if you already have the
zend_function you want to call. zend_call_known_function()
is the base API, the rest are just really thin wrappers around
it for the common case of instance method calls.

Closes GH-5692.

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Fix some UNKNOWN default values

In ext/ffi, ext/intl, ext/mysqli, and ext/pcntl

Add tests to check mismatching function signatures

Closes GH-5666

Fix weird zend_bool usage in Intl Calendar::roll() method

This code really needs to be review as it's convoluted for no good reason.

Add stubs for IntlCalendar

Closes GH-4846

Fix ZPP of intl_cal_set()

Apply tidy formatting

Mostly reindent PHP scripts to spaces.

Use RETURN_THROWS() after zend_parse_method_parameters()

Use RETURN_THROWS() during ZPP in most of the extensions

Except for some bigger ones: reflection, sodium, spl

Cleanup return values for Intl when parameter parsing is unsuccessful

Closes GH-4871.

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Intl: Don't separately report "bad arguments" errors

zpp will be throwing for these now, don't report them in addition to
that.

Refactor zend_object_handlers API to pass zend_object* and zend_string* insted of zval(s).

Eliminate useless $this related check

Require ICU ≥ 50.1

Given that ICU is a set of lively developed libraries, that ICU 50.1
has been released on 2012-11-05, and PHP 7.4 is scheduled to be
released seven years after it,

Require ICU ≥ 50.1

Given that ICU is a set of lively developed libraries, that ICU 50.1
has been released on 2012-11-05, and PHP 7.4 is scheduled to be
released seven years after it, we consider it appropriate to ditch
these legacy versions.

Particularly, that would be a reasonable groundwork to implement part
two of the “Deprecate and remove INTL_IDNA_VARIANT_2003” RFC[1], namely
to default idn_to_ascii()'s and idn_to_utf8()'s $variant parameter to
INTL_IDNA_VARIANT_UTS46, which is not defined in ICU < 4.6.

See also the related discussion on internals@[2].

[1] <https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003>
[2] <http://news.php.net/php.internals/101626>ff

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Avoid magic method hash lookups

Simplify namespace access

The icu namespace is an alias which resolves to the real namespace.

Utilize the recommended way to handle the icu namespace

Use explicit for more type safety

fix build of intl/calendar

Enable and fix printf() format warnings

Add _unchecked() variants of zend_spprintf and zend_strpprintf for
cases where we specifically want to disable these checks, such as
use of %H.