Bug #79717 [Opn->Ver]: Inconsistent handling of 5-digit years
| From: | cmb@php.net | Date: | Fri, 01 Oct 2021 17:31:29 +0000 |
| Subject: | Bug #79717 [Opn->Ver]: Inconsistent handling of 5-digit years | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-236979@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=79717&edit=1
ID: 79717
Updated by: cmb@php.net
Reported by: a dot schilder at gmx dot de
Summary: Inconsistent handling of 5-digit years
-Status: Open
+Status: Verified
Type: Bug
Package: Date/time related
PHP Version: 7.4.7
Block user comment: N
Private report: N
New Comment:
Confirmed: <https://3v4l.org/1bl8m>
> Variant C (5-digit years not supported):
This might be most reasonable, given that date/time calculations
that far into the future are likely inaccurate anyway.
Previous Comments:
------------------------------------------------------------------------
[2020-06-19 16:49:32] a dot schilder at gmx dot de
Description:
------------
When adding intervals to a date time, this can result in a 5-digit year.
When formating this date time, the format "Y" (which should output a 4 digit year
following the documentation) outputs a 5-digit year - but it's not possible to use this output
again as input, because then the year is limited to 4 digits again.
Tested with PHP 7.4.7 and 8.0-dev
Test script:
---------------
<?php
$datetime1 = new \DateTimeImmutable('9999-01-02 15:00:00.000000', new
\DateTimeZone('UTC'));
try {
$datetime2 = $datetime1->add(new \DateInterval('P1Y'));
echo $datetime2->format('Y-m-d H:i:s.u') . \PHP_EOL;
} catch (\Throwable $e) {
echo 'exception' . \PHP_EOL;
}
$datetime3 = \DateTimeImmutable::createFromFormat('Y-m-d H:i:s.u',
$datetime2->format('Y-m-d H:i:s.u'), new \DateTimeZone('UTC'));
if ($datetime3 !== false) {
echo $datetime3->format('Y-m-d H:i:s.u') . \PHP_EOL;
} else {
echo 'false' . \PHP_EOL;
}
try {
$datetime4 = new \DateTimeImmutable($datetime2->format('Y-m-d H:i:s.u'), new
\DateTimeZone('UTC'));
echo $datetime4->format('Y-m-d H:i:s.u') . \PHP_EOL;
} catch (\Throwable $e) {
echo 'exception' . \PHP_EOL;
}
// Workaround with fake year
try {
$datetime5 = new \DateTimeImmutable($datetime2->format('1234-m-d H:i:s.u'), new
\DateTimeZone('UTC'));
$datetime5 = $datetime5->setDate((int)$datetime2->format("Y"),
(int)$datetime2->format("n"), (int)$datetime2->format("j"));
echo $datetime5->format('Y-m-d H:i:s.u') . \PHP_EOL;
} catch (\Throwable $e) {
echo 'exception' . \PHP_EOL;
}
Expected result:
----------------
Variant A ("Y" handled as 4+ digits, preferred):
10000-01-02 15:00:00.000000
10000-01-02 15:00:00.000000
10000-01-02 15:00:00.000000
10000-01-02 15:00:00.000000
Variant B ("Y" handled as 4 digits, following the behavior of "y" - if the
support for the year zero in PHP is the expected behavior and not another bug):
0000-01-02 15:00:00.000000
0000-01-02 15:00:00.000000
0000-01-02 15:00:00.000000
0000-01-02 15:00:00.000000
Variant C (5-digit years not supported):
exception
false
exception
exception
Actual result:
--------------
10000-01-02 15:00:00.000000
false
exception
10000-01-02 15:00:00.000000
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=79717&edit=1