strtotime

[xinghailong]

Description

The following code:

<?php
date_default_timezone_set('Asia/Shanghai');
echo date_default_timezone_get();
echo "\r\n";
echo strtotime('1988-04-12 00:00:00');
echo "\r\n";

PHP 8.1.19 (cli) (built: May 26 2023 15:33:22) (NTS)
Resulted in this output:

Asia/Shanghai
576777600

PHP 7.1.11 (cli) (built: Jul 27 2021 17:03:31) ( NTS )
Resulted in this output:

Asia/Shanghai
576774000

This problem can only be reproduced from 1988-04-11 to 1988-04-17. I have tried several other times but have not been able to reproduce it.

NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"

PHP Version

7.1.11

Operating System

CentOS Linux 7 (Core)

[damianwadley]

576777600 appears to be the correct value. Check that your system timezone database is up to date. That said, I don't see anything in the tzdata announcements list that mentions a correction affecting 1988, so updating might not help.

Otherwise it's possible there was a bug in PHP, however version 7.1 is vastly out of date and has not been supported for years; the lowest version currently supported is PHP 8.2.

[xinghailong]

# timedatectl
      Local time: Sat 2024-10-12 13:59:54 CST
  Universal time: Sat 2024-10-12 05:59:54 UTC
        RTC time: Sat 2024-10-12 05:59:53
       Time zone: Asia/Shanghai (CST, +0800)
     NTP enabled: no
NTP synchronized: yes
 RTC in local TZ: no
      DST active: n/a

[xinghailong]

try to use timezonedb, This problem has been solved.

[xinghailong]

8.1

7.1.11