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Bug #64424 number_format is not multibyte safe
Submitted: 2013-03-14 01:26 UTC Modified: 2013-03-14 07:51 UTC
From: mwalker at wikimedia dot org Assigned: nikic (profile)
Status: Closed Package: *Unicode Issues
PHP Version: 5.3.22 OS: Ubuntu 12.04
Private report: No CVE-ID: None
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 [2013-03-14 01:26 UTC] mwalker at wikimedia dot org 
Description:
------------
I have a UTF-8 PHP file that initializes an array of characters depending on the 
locale. Some of these are multibyte strings.

When using the number_format() function with $dec_point, or $thousands_sep set 
with one of these multibyte entries the returned result contains only the first 
byte of the string (which is only a partial code point.)

Test script:
---------------
$foo = "\xC2\xA0";
$result = number_format(1.23, $foo, $foo);

Expected result:
----------------
$result to contain "\x31\xC2\xA0\x32\x33"

Actual result:
--------------
$result seems to contain "\x31\xC2\x32\x33"

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 [2013-03-14 07:02 UTC] nikic@php.net 
Support for this has already been added in PHP 5.4. See the changelog from http://php.net/number_format:

5.4.0 This function now supports multiple bytes in dec_point and thousands_sep. Only the first byte of each separator was used in older versions.
 [2013-03-14 07:02 UTC] nikic@php.net
-Status: Open +Status: Closed -Assigned To: +Assigned To: nikic
 [2013-03-14 07:07 UTC] pajoye@php.net 
Also I strongly recommend to move to Intl instead.

http://www.php.net/manual/en/numberformatter.format.php
 [2013-03-14 07:25 UTC] mwalker at wikimedia dot org 
Awesome -- good to hear this has been fixed. Sadly I'm stuck on 5.3 for the 
present time. Good tip on the intl extension -- haven't explored it in as much 
depth as I should -- so thanks :)
 [2013-03-14 07:51 UTC] rasmus@php.net 
Note that it is easy enough to substitute single-char placeholders for now while 
you are still stuck on 5.3:

 $f = number_format((float)$val, $precision, 'X', 'Y');
 $f = str_replace(array('X','Y'), array($decsep,$thousep), $f);

Not pretty, but effective.
 
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