Use shorter call chain

Convert zval_get_string() into "fast path" macro and "slow path" function

Use zval_get_string in a few more places

Bring zval_get_string implement in line with make_printable_zval

As make_printable_zval is the "main" string cast, match that one.

Combine HashTable.flags and HashTable.nApplyCount into single 32-bit word

Add functions for extracting long/double/string from zval

These function get the long / double / string value of a zval with
usual cast semantics, but without actually modifying the zval

Add functions for extracting long/double/string from zval

These function get the long / double / string value of a zval with
usual cast semantics, but without actually modifying the zval.

Didn't go on a killing spree for convert_to_* yet...

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Cleanup (1-st round)

Fixed zend_object_get_t in simpleXML

Fix ZTS build

This only makes it compile, it doesn't actually work, presumably
because interned strings are assumed in some places.

Refactored ZVAL flags usage to simplify various checks (e.g. Z_REFCOUNTED(), candidate for GC, etc)

Changed data layout to allow more efficient operations

STR_DUP() doesn't duplicate interned strings anymore. In case new string is required STR_INIT() or STR_ALLOC() should be used.

Replaced (Z_TYPE(x) == IS_REFERENCE) with (Z_ISREF(x))

Refactored GC (incomplete)

Fixed reference conversion

Fixed IS_REFERENCE handling in sort()

Fixed wrong hash value in ext/standard/tests/array/array_combine.php

Fixed segfault (op2 maybe equal to result)

Fixed wrong hash_zval_identical_function

Fixed converting IS_REFERENCE to string

Fixed array comparation

Fixed comparison od references

Fixed object to string conversion

Fixed IS_RESOURCE handling

Missing handling of IS_REF in ext/standard/tests/strings/bug47842.php