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Bug #43453 wrong result if the decimal is not a dot
Submitted: 2007-11-29 16:19 UTC Modified: 2007-11-29 18:07 UTC
From: bammo_merdini at hotmail dot com Assigned:
Status: Not a bug Package: *Math Functions
PHP Version: 5.2.5 OS: Windows XP Pro
Private report: No CVE-ID: None
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 [2007-11-29 16:19 UTC] bammo_merdini at hotmail dot com
If I use number_format() with "." as decimal point and then round it with 1 decimal, it'll work fine, but not if the decimal point is ",".

I'm using WAMP5 and haven't done any changes at all to php.ini.

Reproduce code:

$number = number_format(1000000/1024, 2, ".", "");
echo "A: ".round($number, 2);

$number = number_format(1000000/1024, 2, ",", "");
echo "B: ".round($number, 2);


Expected result:
A: 976.56

B: 976,56

Actual result:
A: 976.56

B: 976


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 [2007-11-29 18:07 UTC]
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at and the instructions on how to report
a bug at

With comma the value isn't treat as float. Then, when it is converted, the part after ',' is removed. See:

$number = number_format(1000000/1024, 2, ",", "");
var_dump($number); // string(6) "976,56"
var_dump((float) $number); // float(976)
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