Edit report at http://bugs.php.net/bug.php?id=47304&edit=1
ID: 47304
Comment by: xiaobo dot bob at gmail dot com
Reported by: lennartvdd at mailordersolutions dot nl
Summary: typecast of numeric string to float produces strange
result
Status: Feedback
Type: Bug
Package: Scripting Engine problem
Operating System: win32 only
PHP Version: 5.2.9
Assigned To: pajoye
New Comment:
i tried set precision to 5/14/20, and keep the serialize_precision =
100.
"echo number_format(1900.0,2)" is always wrong.
here is my code:
echo ini_get("precision")."/".ini_get("serialize_precision")."<br>";
echo number_format(1900.0,2)."-------\n";
Previous Comments:
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[2010-06-14 12:54:30] xiaobo dot bob at gmail dot com
wrong result for the following number is like:
17 - 16.:00
19 - 18.:00
29 - 28.:00
39 - 38.:00
170 - 16:.00
190 - 18:.00
290 - 28:.00
390 - 38:.00
1700 - 1,6:0.00
1900 - 1,8:0.00
------------------------------------------------------------------------
[2010-06-14 12:53:17] paj...@php.net
Which settings were used when you get these results? simply use ini_set
to fetch them.
------------------------------------------------------------------------
[2010-06-14 12:48:02] xiaobo dot bob at gmail dot com
i just changed the number several time, larger or zero, but i don't know
which takes the effects.
i think the problem is in the function "number_format".
now in my envirentment,
"echo number_format(17.0,0)" is correct, result: 17
"echo number_format(17.0,1)" is wrong, result: 16.:
"echo number_format(17.0,3)" is wrong, result: 16.:00
------------------------------------------------------------------------
[2010-06-14 10:39:00] paj...@php.net
xiaobo dot bob at gmail dot com:
Which setting do you use for "precision" and "serialize_precision"?
------------------------------------------------------------------------
[2010-06-14 10:37:04] xiaobo dot bob at gmail dot com
2010-06-14 09:30:45 BST
I have reproduced this bug, but after changed some setting: change the
"precision" and "serialize_precision" setting in php.ini, and even
changed back, or maybe after i added the printf("%.2f\n",$v2), the echo
$v2 is correctted, but the printf result is always 16.:
finally, i wrote such a script:
for ($i=0; $i<400; $i++)
{
echo $i."-";
printf("%f\n",$i);
}
and found there're 8 number have this bug, they are:
17
19
29
39
170
190
290
390
I'm using windows xp in a virtualbox virtual machine, and a delphi
component named php4delphi, the php version is 5.2.13
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