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Bug #7640 problem with weeknumbers
Submitted: 2000-11-04 17:59 UTC Modified: 2000-11-05 00:23 UTC
From: jesper at barra dot se Assigned:
Status: Closed Package: Date/time related
PHP Version: 4.0.3pl1 OS: Linux
Private report: No CVE-ID: None
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 [2000-11-04 17:59 UTC] jesper at barra dot se 
print strftime("%V",mktime(0,0,0,12,31,1999));
# prints weeknumber 52
print strftime("%V",mktime(0,0,0,01,01,2000));
# prints weeknumber 53

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 [2000-11-04 20:16 UTC] rasmus@php.net 
That is expected behaviour.  Please read the manual: http://www.php.net/manual/function.strftime.php

%V - The ISO 8601:1988 week number of the current year as a decimal number, range 01 to 53, where week 1 is the first week that has at least 4 days in the current year, and with Monday as the first day of the week.
 [2000-11-04 23:52 UTC] jah@php.net 
A small correction. This *isn't* the expected result. Or at least, with my understanding of the actual definition of %V.
They should both be 52.

But keeping closed anyway, this is not a PHP related bug.
PHP just calls the systems c-library function strftime and
passes the result back. Nothing to fix unless we roll up our
own version (in which case there could be too much to
fix...).
 [2000-11-05 00:23 UTC] rasmus@php.net 
True.  And on my Linux the specific example returns 52 and 52.
 
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