Change XMLWriter resources to objects

While we generally prefer objects over resources for quite a while, the
procedural XMLWriter API still uses resources, although there is
already

Change XMLWriter resources to objects

While we generally prefer objects over resources for quite a while, the
procedural XMLWriter API still uses resources, although there is
already an object-oriented API which uses objects. This dichotomy
makes no sense, slightly complicates the implementation, and doesn't
allow a stepwise migration to the object-oriented API, which might be
desired. Thus we completely drop the XMLWriter resources in favor of
XMLWriter objects.

We consider the minor BC break acceptable for a major version, since
only explicit type checks (`is_resource()`, `gettype()` etc.) need to
be adapted.

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Add missing argument checks

These functions don't expect any arguments, so we check that none are
given.

Don't explicitly set return value on ZFR failure in ext/xmlwriter

Failing `zend_fetch_resource(2)` throws as of PHP 8.0.0, so explicitly
setting a return value is useless, and also sligh

Don't explicitly set return value on ZFR failure in ext/xmlwriter

Failing `zend_fetch_resource(2)` throws as of PHP 8.0.0, so explicitly
setting a return value is useless, and also slightly confusing.

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Add ext/xmlwriter stubs

Use zend_parse_parameters_none() in XmlWriter::openMemory()

And fix incorrect uses in tests

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 yearly range from copyright notice

Remove year range from copyright notice

Bump minimum libxml version to 2.7.6

Released Oct 2009, part of RHEL 6.

Remove checks for libxml < 2.6.11

These are below our minimum version requirement.

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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Export standard object handlers, to avoid indirect access

year++

year++

year++

Add zend_object_alloc() API

Using ecalloc() to create objects is expensive, because the
dynamic-size memset() is unreasonably slow. Make sure we only
zero the main object structure w

Add zend_object_alloc() API

Using ecalloc() to create objects is expensive, because the
dynamic-size memset() is unreasonably slow. Make sure we only
zero the main object structure with known size, as the properties
are intialized separately anyway.

Technically we do not need to zero the embedded zend_object
structure either, but as long as the memset argument is constant,
a couple more bytes don't really matter.

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Update copyright headers to 2017

Update copyright headers to 2017

Update copyright headers to 2017

Fixed compilation warnings

Happy new year (Update copyright to 2016)

Internal function argumensts cleanup (strict_types)

Fixed bug #69353 (Missing null byte checks for paths in various PHP extensions)

Fix typo: unitialized -> uninitialized

cleanup mod version macros and mod defs, round x