Trim trailing whitespace in source code files

Require SQLite ≥ 3.5.0 for ext/sqlite3 and ext/pdo_sqlite

It is possible to pass flags when opening an SQLite database. For
Sqlite < 3.5.0 these are ignored, since `sqlite3_open` doesn'

Require SQLite ≥ 3.5.0 for ext/sqlite3 and ext/pdo_sqlite

It is possible to pass flags when opening an SQLite database. For
Sqlite < 3.5.0 these are ignored, since `sqlite3_open` doesn't support
flags. Neither a warning or notice is raised in this case, nor is this
behavior documented in the PHP manual. Instead of fixing it either
way, we lift the requirement to SQLite 3.5.0 (released on 2007-09-04)
instead of the former SQLite 3.3.9 (released on 2007-01-04).

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Restore array_key_exists() compatibility for ArrayObject

Doing this by special-casing array_key_exists() for ArrayObject.

Add UPGRADING notes

[ci skip]

Add constants from curl 7.56 to 7.61

[ci skip] Note the required configure changes for bundled libzip

[ci skip] Update NEWS and UPGRADING wrt. unbundling libsqlite

Fix #76975: preg_match difference between 7.3 and < 7.3 - II

[ci skip]

Add constants from curl 7.50 to 7.55

libzip has been unbundled in master only

Cf. <https://github.com/php/php-src/pull/3532>.

Update UPGRADING [ci skip]

Implemented RFC "Always available hash extension"

NEWS and UPGRADING

Deprecate unbinding of $this of non-static methods

Static calls to non-static methods have been fully deprecated in
PHP 7.0 as part of https://wiki.php.net/rfc/reclassify_e_strict.

Deprecate unbinding of $this of non-static methods

Static calls to non-static methods have been fully deprecated in
PHP 7.0 as part of https://wiki.php.net/rfc/reclassify_e_strict.

A combination of ReflectionMethod::getClosure() ("fake closures")
and Closure::bindTo() etc can be used to achieve the same behavior.
This commit ensures that a deprecation notice will be thrown also
in this case.

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Fixed bug #76737

Explicitly prohibit serialization and unserialization of reflection
objects.

Bump minimum libxml version to 2.7.6

Released Oct 2009, part of RHEL 6.

Update NEWS and UPGRADING wrt. PR 2760

Fix

Fix

Drop --without-libzip option from Travis

We need to build against the system libzip now.

Also add an UPGRADING note.

Revert "Implement #67331: Have parse_ini_file add empty entries"

This reverts commit 3f3e914df33793a36f51b4e44745d6a5aec4f685.

The commit broke some tests on Windows, and generally

Revert "Implement #67331: Have parse_ini_file add empty entries"

This reverts commit 3f3e914df33793a36f51b4e44745d6a5aec4f685.

The commit broke some tests on Windows, and generally needs more
though.

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Implement #67331: Have parse_ini_file add empty entries

Some INI processors allow to specify empty values by just giving the
key without the equals sign, for instance MySQL and Python.

Implement #67331: Have parse_ini_file add empty entries

Some INI processors allow to specify empty values by just giving the
key without the equals sign, for instance MySQL and Python. It appears
to be sensible to add this possibility to our INI parser, so that it
can be used for such INI files as well. We choose NULL as the value of
empty values.

This syntactical enhancement is a (minor) BC break, though, as can be
seen by the necessary change to bug49692.ini. The “comment” formerly
has been simply ignored, but now it would be parsed as key with an
empty value.

This PR is based on Adam's former patch.

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Change default of $variant param of idn_to_ascii() and idn_to_utf8()

According to the “Deprecate and remove INTL_IDNA_VARIANT_2003” RFC[1],
we change the default of the $variant paramete

Change default of $variant param of idn_to_ascii() and idn_to_utf8()

According to the “Deprecate and remove INTL_IDNA_VARIANT_2003” RFC[1],
we change the default of the $variant parameter of `idn_to_ascii()` and
`idn_to_utf8()` from `INTL_IDNA_VARIANT_2003` to
`INTL_IDNA_VARIANT_UTS46`.

[1] <https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003>

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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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Renumber ZEND_ACC_... flags