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To: Aleksey Tulinov <aleksey.tulinov@gmail.com>
Cc: internals@lists.php.net
Date: Tue, 14 Oct 2014 22:48:57 +0200
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Subject: Re: [PHP-DEV] Unicode support
From: johannes@schlueters.de (Johannes =?ISO-8859-1?Q?Schl=FCter?=)

On Tue, 2014-10-14 at 23:18 +0300, Aleksey Tulinov wrote:
> Very good point. I'll give another example: is there a substring "s" in 
> string "Maße"? If it's case-sensitive search, when there is no such 
> substring, but if it's case-insensitive search, then "ß" folds into "ss" 
> and substring "s" appears.

In Unicode 5.1 there is "ẞ" U+1E9E LATIN CAPITAL LETTER SHARP S.

(The point of this post mostly is to show that there is another
dimension making this even more complicated, again - different Unicode
versions)

johannes