Fix GH-16199: GREP_HEADER() is broken

This also fixes the libxml version check when the libxml/xmlversion.h
is located elsewhere than libxml2 include directory.

Closes GH-15619.

[skip ci] Fix UPGRADING entries (#16176)

* [skip ci] Fix UPGRADING entries

* [skip ci] Add DBA new class

[ci skip] NEWS for GH-16055

Support stack limit in phpdbg SAPI

Fixes GH-16041
Closes GH-16055

[ci skip] NEWS for GH-15960

Deny resetting an object as lazy during property iteration

Supporting object reset while its properties are being iterated would increase
complexity for little benefit. Furthermore it ma

Deny resetting an object as lazy during property iteration

Supporting object reset while its properties are being iterated would increase
complexity for little benefit. Furthermore it may not be possible to ensure a
consistent behavior between ghosts and proxies (wrt to iteration position).

Iteration is detected by checking if the object's properties ht has iterators.
This requires refactoring the hooked get_iterator() implementation to ensure
that it creates a properties ht iterator immediately.

Closes GH-15960

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Ensure to initialize lazy object in foreach

foreach() by-passes the get_properties() handler and did not always trigger
initialization.

Do not null out obj->properties when resetting object

Engine expects the properties ht to be separated, assigned a new ht, or resized,
but never to be nulled.

Fix handling of undef property during foreach by ref on hooked class

Merge branch 'PHP-8.3' into PHP-8.4

Merge branch 'PHP-8.2' into PHP-8.3

Fix GH-16189: underflow on preg_match/preg_match_all start_offset.

close GH-16191

Merge branch 'PHP-8.3' into PHP-8.4

* PHP-8.3:
Fix GH-16181: phpdbg: exit in exception handler reports fatal error

Merge branch 'PHP-8.2' into PHP-8.3

* PHP-8.2:
Fix GH-16181: phpdbg: exit in exception handler reports fatal error

Fix GH-16181: phpdbg: exit in exception handler reports fatal error

When running PHP code, we must not handle `UnwindExit` exceptions, but
rather have to ignore them.

Closes GH-

Fix GH-16181: phpdbg: exit in exception handler reports fatal error

When running PHP code, we must not handle `UnwindExit` exceptions, but
rather have to ignore them.

Closes GH-16182.

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Merge branch 'PHP-8.3' into PHP-8.4

* PHP-8.3:
Fix GH-15169: stack overflow when var serialization in ext/standard/var

Fix GH-15169: stack overflow when var serialization in ext/standard/var

Adding a stack check here as I consider serialization to be a more
sensitive place where erroring out with an exce

Fix GH-15169: stack overflow when var serialization in ext/standard/var

Adding a stack check here as I consider serialization to be a more
sensitive place where erroring out with an exception seems appropriate.

Closes GH-16159.

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Improve JIT TRACE coverage (#16171)

Now it's possible that PHP tracing JIT loses some parts of the "hot"
code. In case we have a root LOOP trace with an inlined call of some
function

Improve JIT TRACE coverage (#16171)

Now it's possible that PHP tracing JIT loses some parts of the "hot"
code. In case we have a root LOOP trace with an inlined call of some
function, and we get a SIDE exit inside that function - we recorded a
side trace, but finished it a the RETURN of the inlined function. As
result the opcodes betwee RETURN from SIDE trace and LOOP exit were not
covered by tracer and were executed in interpreter.

This patch introduces a "ret_depth" argument that prevents stopping
tracing on RETURN of such SIDE trace.

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Merge branch 'PHP-8.3' into PHP-8.4

* PHP-8.3:
[ci skip] NEWS for GH-16061
Fix array_merge_recursive(): convert_to_array() may need separation (#16061)

Merge branch 'PHP-8.2' into PHP-8.3

* PHP-8.2:
[ci skip] NEWS for GH-16061
Fix array_merge_recursive(): convert_to_array() may need separation (#16061)

[ci skip] NEWS for GH-16061

[ci skip] NEWS for GH-16061

[ci skip] NEWS for GH-16061

Fix array_merge_recursive(): convert_to_array() may need separation (#16061)

[ci skip] NEWS for GH-16025