Bug #76696 [Opn]: Lower-case ß is capitalized as SS instead of ẞ

Edit report at https://bugs.php.net/bug.php?id=76696&edit=1 ID: 76696 Updated by: cmb@php.net Reported by: tim dot eulitz at gmail dot com Summary: Lower-case ß is capitalized as SS instead of ẞ Status: Open Type: Bug Package: mbstring related PHP Version: 7.3.0beta1 Block user comment: N Private report: N New Comment: It seems to me that Unicode is not up to date[1]. [1] <http://unicode.org/faq/casemap_charprop.html#11> Previous Comments: ------------------------------------------------------------------------ [2018-08-02 16:26:59] tim dot eulitz at gmail dot com Description: ------------ I have just read the changelog for PHP 7.3beta1 and noticed this example in the mb_strtoupper changes: >Support for full case-mapping and case-folding has been added. Unlike simple case-mapping, full >case-mapping may change the length of the string. For example: > >mb_strtoupper("Straße") > >// Produces STRAßE on PHP 7.2 >// Produces STRASSE on PHP 7.3" The example provided is actually rather questionable and possibly wrong, since Capital ẞ has been added to standard German in 2017. So instead of either "STRAßE" or "STRASSE", the correct uppercase version should likely be "STRAẞE" mb_strtolower('ẞ') correctly lower-cases the string to 'ß', so this would be consistent behavior in my opinion and would make the behavior more future-proof. Quick Wikipedia reference: https://en.wikipedia.org/wiki/Capital_%E1%BA%9E ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76696&edit=1