Added Inheritance Cache.

This is a new transparent technology that eliminates overhead of PHP class inheritance.

PHP classes are compiled and cached (by opcahce) separately, howeve

Added Inheritance Cache.

This is a new transparent technology that eliminates overhead of PHP class inheritance.

PHP classes are compiled and cached (by opcahce) separately, however their "linking" was done at run-time - on each request. The process of "linking" may involve a number of compatibility checks and borrowing methods/properties/constants form parent and traits. This takes significant time, but the result is the same on each request.

Inheritance Cache performs "linking" for unique set of all the depending classes (parent, interfaces, traits, property types, method types involved into compatibility checks) once and stores result in opcache shared memory. As a part of the this patch, I removed limitations for immutable classes (unresolved constants, typed properties and covariant type checks). So now all classes stored in opcache are "immutable". They may be lazily loaded into process memory, if necessary, but this usually occurs just once (on first linking).

The patch shows 8% improvement on Symphony "Hello World" app.

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Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool is retained as an alias.

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Remove unused bind_hash member

The last usage has been removed in aa16aee51ce903fd65c25d5a7a28ebd97cb1f0e4,
so drop the member as well.

Add system ID entropy API

The `zend_system_id` is a (true global) system ID that fingerprints a process state. When extensions add engine hooks during MINIT/startup, entropy is added the sys

Add system ID entropy API

The `zend_system_id` is a (true global) system ID that fingerprints a process state. When extensions add engine hooks during MINIT/startup, entropy is added the system ID for each hook. This allows extensions to identify that changes have been made to the engine since the last PHP process restart.

Closes GH-5871

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Fix Windows build

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functio

Improve type declarations for Zend APIs

Voidification of Zend API which always succeeded
Use bool argument types instead of int for boolean arguments
Use bool return type for functions which return true/false (1/0)
Use zend_result return type for functions which return SUCCESS/FAILURE as they don't follow normal boolean semantics

Closes GH-6002

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Add support for replaying warnings in opcache

If opcache.record_warnings is enabled, opcache will record
compilation warnings and replay them when the file is included
again. The pri

Add support for replaying warnings in opcache

If opcache.record_warnings is enabled, opcache will record
compilation warnings and replay them when the file is included
again. The primary use case I have in mind for this is automated
testing of the opcache file cache.

This resolves bug #76535.

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JIT refactoring to allow run-time changes of JIT options (triggers, optimization_level, debug flags, etc)

Merge branch 'PHP-7.4'

* PHP-7.4:
Execute preload script under user defined by opcache.preload_user directive

Execute preload script under user defined by opcache.preload_user directive

Add jit_bisect_limit

To help identify which function is being miscompiled.

Merge branch 'PHP-7.4'

* PHP-7.4:
Allow multiple cache instances per user/host on Windows

Allow multiple cache instances per user/host on Windows

Formerly, there was at most a single OPcache instance per user and the
so called system ID (which is determined from the PHP versi

Allow multiple cache instances per user/host on Windows

Formerly, there was at most a single OPcache instance per user and the
so called system ID (which is determined from the PHP version).
Sometimes multiple OPcaches might be desired, though, particularly for
unrelated CLI scripts, which may even be necessary (e.g. for our test
suite in parallel mode).

We therefore introduce a new INI directive `opcache.cache_id` which
allows to configure independent OPcache instances for the same user.

We also use `GetUserNameW()` instead of `php_win32_get_username()`,
because the latter retrieves the user name encoded in the
`default_charset`, which can obviously yield different results for
different charsets, leading to OPcache "incompatibilities". Slightly
worse, some characters may not even be encodeable in the
`default_charset` and would be replaced by question marks, which could
result in different users sharing the same OPcache.

We also refactor, and re-use existing APIs to avoid duplicated code.

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Additional fix for bug #78185 (File cache no longer works)

Merge branch 'PHP-7.4'

* PHP-7.4:
Turn system_id into a true global

Turn system_id into a true global

The system_id is identical for all threads and can be computed during
module startup, so there is no need to calculate and store it for each
thread.

Merge branch 'PHP-7.4'

* PHP-7.4:
Moved NEWS entry
Fixed possible crashes, because of inconsistent PCRE cache and opcache SHM reset

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Moved NEWS entry
Fixed possible crashes, because of inconsistent PCRE cache and opcache SHM reset

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fixed possible crashes, because of inconsistent PCRE cache and opcache SHM reset

Fixed possible crashes, because of inconsistent PCRE cache and opcache SHM reset

Avoid code duplication

Added JIT compiler for x86 and x86_64

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Avoid dependency on "struct flock" fields order.

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Avoid dependency on "struct flock" fields order.

Avoid dependency on "struct flock" fields order.