From: reidw at rawsound dot com
Operating system: Darwin 9.2
PHP version: 5.2.5
PHP Bug Type: Calendar related
Bug description: GregorianToJD wrong return value
Description:
------------
The function gregroiantojd() returns the wrong value. This was also
tested with PHP 5.2.2 on Linux FC3 and PHP 5.1.2 on Windows Server 2003
with the same results. Results are off by one day for positive years,
and further off for zero and negative years. By definition, when using
negative years rather than a suffix the pattern should be: ..., -2, -1,
0, 1, 2, ... . Year 2 corresponds to 2AD, year 1 corresponds to 1AD,
year 0 corresponds to 1BC, and year -1 corresponds to 2BC, etc.
Information can be found from the links in the PHP manual. Code for
comparison is taken from those links and given below.
Reproduce code:
---------------
built-in:
echo gregoriantojd(3,16,1)."\n";
echo gregoriantojd(3,16,0)."\n";
echo gregoriantojd(3,16,-1);
reproduced from PHP manual links:
echo GtoJD(3,16,1)."\n";
echo GtoJD(3,16,0)."\n";
echo GtoJD(3,16,-1);
function GtoJD($m,$d,$y)
{
return (int) (((int) ( 1461 * ( $y + 4800 + ($m-14) / 12 ) ) / 4) +
((int) ( 367 * ( $m - 2 - 12 * ( ($m-14) / 12 ) ) ) / 12) -
((int) ( 3 * (int)( ( $y + 4900 + ($m-14) / 12 ) / 100 ) ) / 4) +
$d - 32075);
}
Expected result:
----------------
The expected results are (from the reproduced code):
1721501
1721137
1720771
Actual result:
--------------
Actual results (from the built-in gregoriantojd()):
1721500
0
1721135
--
Edit bug report at http://bugs.php.net/?id=44474&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=44474&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=44474&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=44474&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=44474&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=44474&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=44474&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=44474&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=44474&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=44474&r=support
Expected behavior: http://bugs.php.net/fix.php?id=44474&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=44474&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=44474&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=44474&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=44474&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=44474&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=44474&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=44474&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=44474&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=44474&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=44474&r=mysqlcfg
