Fix GH-16292: Segmentation fault in ext/xmlreader/php_xmlreader.c:1282

3 issues:
1) RETURN_NULL() was used via the macro NODE_GET_OBJ(), but the function
returns false on failure

Fix GH-16292: Segmentation fault in ext/xmlreader/php_xmlreader.c:1282

3 issues:
1) RETURN_NULL() was used via the macro NODE_GET_OBJ(), but the function
returns false on failure and cannot return null according to its
stub.
2) The struct layout of the different implementors of libxml only
guarantees overlap between the node pointer and the document
reference, so accessing the std zend_object may not work.
3) DOC_GET_OBJ() wasn't using ZSTR_VAL().

Closes GH-16307.

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Fix property_exists() and unset() for XMLReader (#16079)

Make a few xmlreader property handlers static

Fix -Wundef/C4668 warnings (#15853)

- ZTS is either undefined or defined (to 1)
- PHP_WIN32 is either undefined or defined (to 1)
- HAVE_LIBEDIT is either undefined or defined (to 1)

Make internal run_time_cache a persistent allocation (#15040)

We also add zend_map_ptr_static, so that we do not incur the overhead of constantly recreating the internal run_time_cache point

Make internal run_time_cache a persistent allocation (#15040)

We also add zend_map_ptr_static, so that we do not incur the overhead of constantly recreating the internal run_time_cache pointers on each request.
This mechanism might be extended for mutable_data of internal classes too.

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Use "must not" instead of "cannot" wording

Use new helper function for "cannot be empty" ValueErrors

Fix GH-15123: var_dump doesn't actually work on XMLReader (#15130)

De-duplicate readonly property modification error message (#14972)

[RFC] Implement XMLReader::fromUri() and XMLReader::fromString()

[RFC] Add stream open functions to XML{Reader,Writer}

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

Preferably include from build dir (#13516)

* Include from build dir first

This fixes out of tree builds by ensuring that configure artifacts are included
from the build dir.

Preferably include from build dir (#13516)

* Include from build dir first

This fixes out of tree builds by ensuring that configure artifacts are included
from the build dir.

Before, out of tree builds would preferably include files from the src dir, as
the include path was defined as follows (ignoring includes from ext/ and sapi/) :

-I$(top_builddir)/main
-I$(top_srcdir)
-I$(top_builddir)/TSRM
-I$(top_builddir)/Zend
-I$(top_srcdir)/main
-I$(top_srcdir)/Zend
-I$(top_srcdir)/TSRM
-I$(top_builddir)/

As a result, an out of tree build would include configure artifacts such as
`main/php_config.h` from the src dir.

After this change, the include path is defined as follows:

-I$(top_builddir)/main
-I$(top_builddir)
-I$(top_srcdir)/main
-I$(top_srcdir)
-I$(top_builddir)/TSRM
-I$(top_builddir)/Zend
-I$(top_srcdir)/Zend
-I$(top_srcdir)/TSRM

* Fix extension include path for out of tree builds

* Include config.h with the brackets form

`#include "config.h"` searches in the directory containing the including-file
before any other include path. This can include the wrong config.h when building
out of tree and a config.h exists in the source tree.

Using `#include <config.h>` uses exclusively the include path, and gives
priority to the build dir.

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Update ext/xmlreader dependencies (#14572)

- ext/dom is optional (using HAVE_DOM for cases when dom is build as
a shared extension to make it required in that case)
- ext/libxml is

Update ext/xmlreader dependencies (#14572)

- ext/dom is optional (using HAVE_DOM for cases when dom is build as
a shared extension to make it required in that case)
- ext/libxml is required

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Fix GH-14183: XMLReader::open() can't be overridden

We should only return the override if the internal static method is matched.

Closes GH-14194.

Simplify prop handler of XMLReader (#14023)

As XMLReader only exposes a single class, and the property handlers are
statically set, we don't need to store the pointer to the property

Simplify prop handler of XMLReader (#14023)

As XMLReader only exposes a single class, and the property handlers are
statically set, we don't need to store the pointer to the property
handler table inside the object.
This simplifies the code and reduces the memory required for XMLReader.

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Simplify DOM_RET_OBJ macro

Use string literal equality helper function in xmlreader_get_method

Set xmlreader property handler hash size to a precalculated value

Don't put xmlreader prop handler data on the heap

Make readonly error message consistent

Remove unused write_func in php_xmlreader.c

Remove unimplemented, unreferenced function from php_xmlreader.c

Fix null pointer dereferences in case of allocation failure

Closes GH-12506.

Sanitize libxml2 globals before parsing

Fixes GHSA-3qrf-m4j2-pcrr.

To parse a document with libxml2, you first need to create a parsing context.
The parsing context contains par

Sanitize libxml2 globals before parsing

Fixes GHSA-3qrf-m4j2-pcrr.

To parse a document with libxml2, you first need to create a parsing context.
The parsing context contains parsing options (e.g. XML_NOENT to substitute
entities) that the application (in this case PHP) can set.
Unfortunately, libxml2 also supports providing default set options.
For example, if you call xmlSubstituteEntitiesDefault(1) then the XML_NOENT
option will be added to the parsing options every time you create a parsing
context **even if the application never requested XML_NOENT**.

Third party extensions can override these globals, in particular the
substitute entity global. This causes entity substitution to be
unexpectedly active.

Fix it by setting the parsing options to a sane known value.
For API calls that depend on global state we introduce
PHP_LIBXML_SANITIZE_GLOBALS() and PHP_LIBXML_RESTORE_GLOBALS().
For other APIs that work directly with a context we introduce
php_libxml_sanitize_parse_ctxt_options().

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Fix GH-11548 (Argument corruption when calling XMLReader::open or XMLReader::XML non-statically with observer active)