IS_CONST operands don't have to be separated. Use reference-counting instead of duplication.

- with opcache all IS_CONST operands are not refcounted (scalars, interned strings or immutable a

IS_CONST operands don't have to be separated. Use reference-counting instead of duplication.

- with opcache all IS_CONST operands are not refcounted (scalars, interned strings or immutable arrays)
- without opcache IS_CONST operands are not shared between processes or threads and may use common reference counters

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Merge branch 'PHP-7.0'

bump year which is missed in rev 49493a2

Implemented the RFC `Support Class Constant Visibility`.

Squashed commit of the following:

commit f11ca0e7a57793fa0e3e7f6d451720e6c42bb0b9
Author: Dmitry Stogov <dmitry@zend.com

Implemented the RFC `Support Class Constant Visibility`.

Squashed commit of the following:

commit f11ca0e7a57793fa0e3e7f6d451720e6c42bb0b9
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue Dec 8 12:38:42 2015 +0300

Fixed test expectation

commit 211f873f542504d0a0f72b6b5cb23908a1c99a2d
Author: Dmitry Stogov <dmitry@zend.com>
Date: Tue Dec 8 12:28:38 2015 +0300

Embed zend_class_constant.flags into zend_class_constants.value.u2.access_flags

commit 51deab84b2cdbf9cdb1a838cf33b2ee45c61748b
Author: Dmitry Stogov <dmitry@zend.com>
Date: Mon Dec 7 11:18:55 2015 +0300

Fixed issues found by Nikita

commit 544dbd5b47e40d38a8ccb96bc5583e9cb7fdd723
Author: Dmitry Stogov <dmitry@zend.com>
Date: Sat Dec 5 02:41:05 2015 +0300

Refactored immplementation of https://wiki.php.net/rfc/class_const_visibility
@reeze created an RFC here and I emailed internals here and didn't get any responses positive/negative.

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Fixed incorrect type usage

Use NULL where possible for exception class

Matches usage of zend_throw_exception()/zend_throw_exception_ex().

Remove need to pass error level

Enable throwing custom exceptions from errors

Use ZSTR_ API to access zend_string elements (this is just renaming without semantick changes).

Don't propogate "fake" EX(called_scope) and EX(This) into each internal function.
They need quite seldom and it's cheaper to get them from corresponfing upper stack frame.

Convert fatal errors into EngineExceptions
Make zval_update_constant_ex(), zval_update_constant(), zend_update_class_constants() and zend_ast_evaluate() return SUCCESS or FAILURE.

Convert fatal errors into EngineExceptions

Use zend_error_noreturn() for fatal errors

Reimplemented special constant handling. Now __HALT_COMPILER_OFFSET__ is resolved at compile-time. __CLASS__ retrived using separate ZEND_FETCH_CLASS_NAME opcode.

Revert "Improved zend_get_special_constant"

This reverts commit 624eb49e78b7ae50a85bb4b9c4dc601395fbe71e.

Improved zend_get_special_constant

bump year

trailing whitespace removal

first shot remove TSRMLS_* things

fix datatype mismatches

and convert APIs to size_t where zend_string internally used

Avoid double IS_INTERNED() check

master renames phase 1

further fixes on core

first shot on merging the core fro the int64 branch

Fixed bug #67725 (now we create immutable arrays only in SHM)