$timeStr='1987-5-4'; echo 'Test time:'.$timeStr; echo PHP_EOL; $prcTime=strtotime($timeStr); echo 'PRC time:'; echo $prcTime; echo PHP_EOL; date_default_timezo

Forgot to ask the question, what is the reason for this? How to deal with this bug?

php strtotime time zone problem, in some years the UTC time zone and the PRC time zone differ by 9 hours

$timeStr='1987-5-4';
echo '测试时间：'.$timeStr;
echo PHP_EOL;
$prcTime=strtotime($timeStr);
echo 'PRC时间:';
echo $prcTime;
echo PHP_EOL;
date_default_timezone_set('UTC');
$utcTime=strtotime($timeStr);
echo 'UTC时间：';
echo $utcTime;
echo PHP_EOL;
echo 'UTC与PRC时间相差：'.(($utcTime-$prcTime)/3600).'小时';
echo PHP_EOL;

Result:

Test time: 1987-5-4

PRC time:547052400

UTC time: 547084800

UTC and PRC time Difference: 9 hours

After testing, the difference between UTC and PRC time for dates from 1987 to 1991 is 9 hours.

The php version is

PHP 7.1.9 (cli) (built: Aug 30 2017 18:34:46) (ZTS MSVC14 (Visual C 2015) x64)

刘强2127 days ago1499

php strtotime time zone problem, in some years the UTC time zone and the PRC time zone differ by 9 hours

reply all(5)I'll reply