add NEWS/UPGRADING

NEWS

@@ -13,6 +13,7 @@ PHP                                                                        NEWS
 
 - Core:
   . Added boolval(). (Jille Timmermans).
+  . Fixed bug #18556 (Engine uses locale rules to handle class names). (Stas)
   . Fixed bug #61681 (Malformed grammar). (Nikita Popov, Etienne, Laruence).
   . Fixed bug #61038 (unpack("a5", "str\0\0") does not work as expected).
     (srgoogleguy, Gustavo)

UPGRADING

@@ -21,6 +21,8 @@ PHP X.Y UPGRADE NOTES
 ========================================
 
 - Drop Windows XP and 2003 support. (Pierre)
+- All internal case insensitivity handling for class, fucntion and constant 
+  names is done according to ASCII rules, current locale settings are ignored. 
 
 ========================================
 2. New Features

UPGRADING.INTERNALS

@@ -4,6 +4,7 @@ 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
@@ -26,6 +27,32 @@ PHPAPI int php_stream_context_set_link(php_stream_context *context,
 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.
+
 ========================
 2. Build system changes
 ========================
@@ -34,5 +61,5 @@ PHPAPI int php_stream_context_del_link(php_stream_context *context,
     - 
 
   b. Windows build system changes
-    - 
+    - Drop Windows XP and 2003 support.
   

Zend/tests/bug18556.phpt

@@ -25,6 +25,7 @@ foreach(get_declared_classes() as $class)
 {
 	if(!class_exists($class))
 		echo "$class No Longer Exists!\n";
+
 }
 echo "Done.\n";
 ?>