Fix internal_encoding fallback in mbstring

By introducing a hook that is called whenever one of
internal_encoding / input_encoding / output_encoding changes, so
that mbstring can adj

Fix internal_encoding fallback in mbstring

By introducing a hook that is called whenever one of
internal_encoding / input_encoding / output_encoding changes, so
that mbstring can adjust it's internal state.

This also makes internal_encoding work with zend multibyte.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Remove checks for locale.h, setlocale, localeconv

Remove checks for locale.h, setlocale, localeconv

The `<loccale.h>` header file, setlocale, and localeconv are part of the
standard C89 [1] and on current systems can be used uncondition

Remove checks for locale.h, setlocale, localeconv

The `<loccale.h>` header file, setlocale, and localeconv are part of the
standard C89 [1] and on current systems can be used unconditionally.

Since PHP 7.4 requires at least C89 or greater, the `HAVE_LOCALE_H`,
`HAVE_SETLOCALE`, and `HAVE_LOCALECONV` symbols defined by Autoconf in
configure.ac [2] can be ommitted and simplifed.

The bundled libmagic (file) has also been patched already in version
5.35 and up in upstream location so when it will be patched also in
php-src the check for locale.h header is still left in the configure.ac
and in windows headers definition file.

[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.4
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4

Omit the bundled libmagic files

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Merge branch 'PHP-7.4'

* PHP-7.4:
Remove HAVE_SIGNAL_H

Remove HAVE_SIGNAL_H

The `<signal.h>` header file is part of the standard C89 headers [1] and
on current systems can be included unconditionally.

Since file requires at least C8

Remove HAVE_SIGNAL_H

The `<signal.h>` header file is part of the standard C89 headers [1] and
on current systems can be included unconditionally.

Since file requires at least C89 or greater, the `HAVE_SIGNAL_H` symbol
defined by Autoconf in Zend.m4 [2] can be ommitted and simplifed.

The bundled libmagic (file) also ommits the usage of HAVE_SIGNAL_H since
5.35 however current version in PHP is very modified 5.34 version and
will be refactored separately. Check for HAVE_SIGNAL_H is therefore
still done in the configure.ac.

Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4

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Merge branch 'PHP-7.4'

* PHP-7.4:
Implement stricter CRT check

Implement stricter CRT check

This aligns with the recommendations about VS2015, VS2017 and VS2019
compatibility.

More info below
https://devblogs.microsoft.com/cppblog/cpp-b

Implement stricter CRT check

This aligns with the recommendations about VS2015, VS2017 and VS2019
compatibility.

More info below
https://devblogs.microsoft.com/cppblog/cpp-binary-compatibility-and-pain-free-upgrades-to-visual-studio-2019/

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Merge branch 'PHP-7.4'

* PHP-7.4:
Implemented a faster way to access predefined TSRM resources - CG(), EG(), etc.

Implemented a faster way to access predefined TSRM resources - CG(), EG(), etc.

Merge branch 'PHP-7.4'

* PHP-7.4:
drop unused parameter from zend_startup

drop unused parameter from zend_startup

Merge branch 'PHP-7.4'

* PHP-7.4:
Move Makefile.global and Makefile.gcov to build directory

Move Makefile.global and Makefile.gcov to build directory

These files can be stored in the build directory instead of bloating the
project root directory.

Merge branch 'PHP-7.4'

* PHP-7.4:
Implement FR #77377 handle CTRL+C in Windows

Implement FR #77377 handle CTRL+C in Windows

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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Merge branch 'PHP-7.4'

* PHP-7.4:
Fix bug 76596: phpdbg supports display_errors=stderr

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix bug 76596: phpdbg supports display_errors=stderr

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fix bug 76596: phpdbg supports display_errors=stderr

Fix bug 76596: phpdbg supports display_errors=stderr

Remove yearly range from copyright notice

Remove year range from copyright notice

Remove track_errors and $php_errormsg

This has been deprecated in PHP 7.2 as part of
https://wiki.php.net/rfc/deprecations_php_7_2.

Removed transparent wrapper