Fix print_flat_hash for objects

Use optimized zend_array_dup() function. convert zend_hash_num_elements() and zend_hash_next_free_element() into macros.

Added vstrpprintf strpprintf to avoid duplicate string

(the function name maybe improvement)

fixed ZEND_DEBUG usage

Fix SXE->string cast for __toString in inheriting class

This issue was originally hacked around in zend_make_printable_zval.
I've now moved the overridden __toString() handling into the

Fix SXE->string cast for __toString in inheriting class

This issue was originally hacked around in zend_make_printable_zval.
I've now moved the overridden __toString() handling into the SXE
cast_object handler, so everything invoking that handler
(zend_make_printable_zval, convert_to_string, zval_get_string,
and various other more obscure usages) see the same behavior.

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Split IS_BOOL into IS_FALSE and IS_TRUE

Use appropriate macros

Fixed compilation warnings

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

Use zval_get_string in print_zval and propagate TSRMLS

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

Use ZEND_FETCH_FOREACH_* macros to iterate over HashTables instead of zend_hash_move_forward() and family.

Cleanup (1-st round)

Fixed zend_object_get_t in simpleXML

Fix function copying in ZTS

Still doesn't entirely work :/

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)

Refactored data structures to keep zend_object* instead of a whole zval in some places

Use ZVAL_DEREF() macro

Refactored IS_INDIRECT usage for CV and object properties to support HashTable resizing

Refactored EG(active_symbol_table) to be zend_array* instead of HashTable*

IS_REFERENCE is unfrequent

Passing symbol_table into user error handlers

Fixed ASSIGN_OBJ with IS_TMP and IS_CONST operand

Generator related fixes