UPGRADING.INTERNALS

$Id$

UPGRADE NOTES - PHP X.Y

1. Internal API changes
  a. Streams pooling API
  b. Lowercasing and locales

2. Build system changes
  a. Unix build system changes
  b. Windows build system changes


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1. Internal API changes
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	a. Streams pooling API

The streams pooling API has been removed. The following functions no longer
exist:

PHPAPI int php_stream_context_get_link(php_stream_context *context,
		const char *hostent, php_stream **stream);
PHPAPI int php_stream_context_set_link(php_stream_context *context,
		const char *hostent, php_stream *stream);
PHPAPI int php_stream_context_del_link(php_stream_context *context,
		php_stream *stream);

	b. Lowercasing and locales

The lowercasing functions in zend_operators.c were split into those that do 
lowercasing according to locale rules and those that do ASCII lowercasing.
ASCII:

                zend_str_tolower_copy
                zend_str_tolower_dup
                zend_str_tolower
                zend_binary_strcasecmp
                zend_binary_strncasecmp

Locale-based:
                zend_binary_strncasecmp_l
                zend_binary_strcasecmp_l
                zend_binary_zval_strcasecmp
                zend_binary_zval_strncasecmp
                string_compare_function_ex
                string_case_compare_function

Internal engine lowercasing will be using ASCII-only rules. User-facing functions,
such as strcasecmp, will be using locale rules. 

Two new functions - zend_binary_strncasecmp_l and zend_binary_strcasecmp_l - added as 
locale-based counterparts to zend_binary_strcasecmp and zend_binary_strncasecmp.

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2. Build system changes
========================

  a. Unix build system changes
    - 

  b. Windows build system changes
    - Drop Windows XP and 2003 support.