Merge branch 'PHP-7.4'

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3

Fixed bug #75546

By respecting the SILENT flag when checking the visibility of a
class constant.

Merge branch 'PHP-7.4'

* PHP-7.4:
Remove local variables

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly

Remove local variables

This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.

A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.

This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.

With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.

Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.

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Remove bareword fallback for constants

Access to undefined constants will now always result in an Error
exception being thrown.

This required quite a few test changes, because t

Remove bareword fallback for constants

Access to undefined constants will now always result in an Error
exception being thrown.

This required quite a few test changes, because there were many
buggy tests that unintentionally used bareword fallback in combination
with error suppression.

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Remove support for case-insensitive constants

The only remaining case-insensitive constants are null, true and
false, which are handled explicitly.

In the future we may convert

Remove support for case-insensitive constants

The only remaining case-insensitive constants are null, true and
false, which are handled explicitly.

In the future we may convert them from constants to reserved keywords.

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Adios, yearly copyright ranges

Adios, yearly copyright ranges

Clean up unnecessary ternary expressions and simplify some returns

- Simplify conditions
- Use ZEND_HASH_APPLY_* instead of hard-coded booleans
- Use ZEND_NORMALIZE_BOOL
- Drop s

Clean up unnecessary ternary expressions and simplify some returns

- Simplify conditions
- Use ZEND_HASH_APPLY_* instead of hard-coded booleans
- Use ZEND_NORMALIZE_BOOL
- Drop sign in favor of ZEND_NORMALIZE_BOOL

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Future-proof email addresses

Update email addresses. We're still @Zend, but future proofing it...

Fixed ZTS build

Pack zend_constant.flags and zend_constant.module_number into reserved space inside zend_constant.value.

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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Reduce overhead of case-insensitive constants deprecation for "fast path"

Deprecate case-insensitive constants

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

Replace legacy zval_dtor() by zval_ptr_dtor_nogc() or even more specialized destructors.
zval_dtor() doesn't make a lot of sense in PHP-7.* and it's used incorrectly in some places.
Its occur

Replace legacy zval_dtor() by zval_ptr_dtor_nogc() or even more specialized destructors.
zval_dtor() doesn't make a lot of sense in PHP-7.* and it's used incorrectly in some places.
Its occurances should be replaced by zval_ptr_dtor() or zval_ptr_dtor_nogc(), or even more specialized destructors.

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API cleanup. Removed unused functions (kept compatibility macros).

Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.

Avoid useless checks, using zend_string_efree(), in cases where the string is known to be a temporary allocated zend_string.

Moved IS_CONSTANT_VISITED_MARK, used for protection from recursive self-referencing class constants, from zval.u1.v.type_flags into zval.u2.access_flags.

year++

year++