Edit report at https://bugs.php.net/bug.php?id=76374&edit=1
ID: 76374
Comment by: fcasadei at fcpartner dot com
Reported by: fcasadei at fcpartner dot com
Summary: Date difference varies according day time
Status: Assigned
Type: Bug
Package: Date/time related
Operating System: linux & windows
PHP Version: 7.0.30
Assigned To: derick
Block user comment: N
Private report: N
New Comment:
Geee !! you are the author ??
Congrats Congrats congrats congrats !!!
Php is the coolest language I ever used (in 30 yars ... started with 8086 asembly, pascal, cobol,
fortran, basic, ... list, ... and some I won't admit)
Previous Comments:
------------------------------------------------------------------------
[2018-05-30 12:21:27] a at b dot c dot de
Given that the interval changed when the time was specified, I did suspect that something happened
sometime in the morning the start or the afternoon of the end that changed the length; but No,
Europe/Paris doesn't have anything special to say about those dates.
I looked at a few other zones and intervals.
(a) Asia/Baghdad also displays varying results despite not crossing a DST boundary
(b) America/Denver is consistent, even though it does cross a DST boundary.
(c) The period from 1 January to 1 February gives consistent results for all zones
(d) The period from 1 July to 1 August does not; this time though the affected zones are
Europe/Paris, Europe/Lisbon, Asia/Baghdad, and Pacific/Auckland.
(e) The number of days is always the same. For the January-October period, it is 273; the variation
seen in Europe/Paris and Asia/Baghdad is that 273 days makes nine months when counting from
midnight, but only eight months 30 days when counting from midday.
<?php
$zones_to_try = [
"UTC",
"Europe/Paris",
"Europe/Lisbon",
"Asia/Baghdad",
"Pacific/Auckland",
"America/Phoenix",
"America/Denver",
];
foreach($zones_to_try as $zone)
{
echo "$zone:\n";
date_default_timezone_set($zone);
$objDateTo = new dateTime('2017-10-01');
$objDateFrom = new dateTime('2017-01-01');
$interval = $objDateTo->diff($objDateFrom);
echo "From {$objDateFrom->format('c')} to {$objDateTo->format('c')}:
{$interval->m}m {$interval->d}d ({$interval->days} days)\n";
$objDateTo = new dateTime('2017-10-01 12:00:00');
$objDateFrom = new dateTime('2017-01-01 12:00:00');
$interval = $objDateTo->diff($objDateFrom);
echo "From {$objDateFrom->format('c')} to {$objDateTo->format('c')}:
{$interval->m}m {$interval->d}d ({$interval->days} days)\n";
echo "\n\n";
}
?>
------------------------------------------------------------------------
[2018-05-28 17:38:33] derick@php.net
Considering that the author is European (me), I can assure you there is nothing US centric here.
However, there does seem to be a bug, as it should indeed say 9 in each case.
Assigning to myself.
------------------------------------------------------------------------
[2018-05-28 13:41:31] fcasadei at fcpartner dot com
thanks
but with ("date.timezone", "Europe/Paris"), back to 8 and 9 !!
Is PHP another american centric stuff ?
ini_set("date.timezone", "Europe/Paris");
$objDateTo = new dateTime('2017-10-01');
$objDateFrom = new dateTime('2017-01-01');
$interval = $objDateTo->diff($objDateFrom);
echo $interval->m;
$objDateTo = new dateTime('2017-10-01 00:00:00');
$objDateFrom = new dateTime('2017-01-01 00:00:00');
$interval = $objDateTo->diff($objDateFrom);
echo $interval->m;
$objDateTo = new dateTime('2017-10-01 12:00:00');
$objDateFrom = new dateTime('2017-01-01 12:00:00');
$interval = $objDateTo->diff($objDateFrom);
echo $interval->m;
gives 889 !!
12 hours make a month ???
------------------------------------------------------------------------
[2018-05-26 14:15:00] rauljosesantos at gmail dot com
If you define your timezone:
ini_set("date.timezone", "GMT");
Both work nicely
https://3v4l.org/SuVe2
ini_set("date.timezone", "GMT");
$objDateTo = new dateTime('2017-10-01')
$objDateFrom = new dateTime('2017-01-01
$interval = $objDateTo->diff($objDateFr
echo "Date Only: " . $interval->m . "\r
$objDateTo = new dateTime('2017-10-01 1
$objDateFrom = new dateTime('2017-01-01
$interval = $objDateTo->diff($objDateFr
echo "Date and Time: " . $interval->m;
------------------------------------------------------------------------
[2018-05-26 13:18:19] fcasadei at fcpartner dot com
In France, I don't know exactly.
------------------------------------------------------------------------
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https://bugs.php.net/bug.php?id=76374
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