Merge branch 'typed_returns' of github.com:morrisonlevi/php-src into test

* 'typed_returns' of github.com:morrisonlevi/php-src:
Implement return types

Implement return types

RFC is documented here: https://wiki.php.net/rfc/return_types

bump year

bump year

Bump year

Added test and possible fix for https://bugs.php.net/bug.php?id=67068

trailing whitespace removal

Added new API function 'zend_string* zend_string_tolower(zend_string*)'.
It simplifies code and avoids unnecessary allocation and copying if string is already in lower case.

Don't count variadic argument in zend_func.common.num_args. This allows faster CALL/RETURN code.

first shot remove TSRMLS_* things

Fixed compilation warnings

Removed ZEND_ACC_FINAL_CLASS which is unnecessary. This also fixed some currently defined classes as final which were just not being considered as such before.

Use zend_string* for op_array->arg_info[]->name and op_array->arg_info[]->class_name. For internal functions we still use char*.

Remove support for classes without class entries

get_class_entry must be non-NULL and return non-NULL.

Replaced EG(This) and EX(object) with EX(This).
Internal functions now recieves zend_execute_data as the first argument.

Fixed useless or duplicated IS_INTERNED() checks

It should be int

Fixed folder mark

Fixed Closure::apply() for int64

Merge branch 'master' into Closure_apply

Add zend_string_equals and zend_string_equals_literal

master renames phase 2

master renames phase 1

Just return, no need for RETURN_NULL()

Accuracy