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Request #81244 make *printf() function Unicode-aware
Submitted: 2021-07-11 10:21 UTC Modified: 2021-07-12 13:31 UTC
From: flightvision at googlemail dot com Assigned:
Status: Wont fix Package: *Unicode Issues
PHP Version: 8.0.8 OS:
Private report: No CVE-ID: None
View Developer Edit
 [2021-07-11 10:21 UTC] flightvision at googlemail dot com 
Description:
------------
The *printf() functions are having problems if strings contain non-ASCII characters.

Test script:
---------------
echo sprintf('%3.3s', 'ö12345');
echo sprintf('%3.3s', '12ö345');

Expected result:
----------------
ö12
12ö

Actual result:
--------------
ö1
12�

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 [2021-07-12 13:31 UTC] nikic@php.net
-Status: Open +Status: Wont fix
 [2021-07-12 13:31 UTC] nikic@php.net 
printf() widths are in terms of bytes, and this isn't going to change. Please use mb_substr() or grapheme_substr() to truncate a string to a certain number of characters, depending on which notion of "character" you wish to use (I would recommend extended grapheme clusters, if you don't want to "truncate" away combining characters etc).
 
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