Doc #77840 [Com]: strftime("%s") returns false results

Edit report at https://bugs.php.net/bug.php?id=77840&edit=1 ID: 77840 Comment by: dave_martin at mindspring dot com Reported by: dc at ftb-esv dot de Summary: strftime("%s") returns false results Status: Open Type: Documentation Problem Package: *General Issues PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Tangentially related, the use of %s with both strftime and gmstrftime on Windows does not produce any output at all using PHP 7.3.3 64-bit thread safe. Test script: <?php echo strftime ('%s',1546303600); // results in no output echo gmstrftime('%s',1546303600); // results in no output ?> Previous Comments: ------------------------------------------------------------------------ [2019-04-03 18:44:34] dc at ftb-esv dot de Description: ------------ --- From manual page: https://php.net/function.strftime --- Functions strftime() and gmstrftime() return (different) wrong results for format "%s". I tested it with PHP 5.5.14 and PHP 7.2.5, bith with CLI and Apache. I used timestamps with and without DST. Test script: --------------- <?PHP header('Content-Type: text/plain; charset=utf-8'); $list = array( 1546303600, // 2018-01-01 00:46:40 UTC 1556703600, // 2019-05-01 09:40:00 UTC ); echo "\ndate_default_timezone_set('UTC')\n"; date_default_timezone_set('UTC'); foreach ( $list as $time ) { printf("\n%u\n%4s\n%s\n", $time, strftime('%s, %F %T %Z',$time), gmstrftime('%s, %F %T %Z',$time) ); } echo "\ndate_default_timezone_set('Europe/Berlin')\n"; date_default_timezone_set('Europe/Berlin'); foreach ( $list as $time ) { printf("\n%u\n%4s\n%s\n", $time, strftime('%s, %F %T %Z',$time), gmstrftime('%s, %F %T %Z',$time) ); } ?> Expected result: ---------------- date_default_timezone_set('UTC') 1546303600 1546303600, 2019-01-01 00:46:40 UTC 1546303600, 2019-01-01 00:46:40 GMT 1556703600 1556703600, 2019-05-01 09:40:00 UTC 1556703600, 2019-05-01 09:40:00 GMT date_default_timezone_set('Europe/Berlin') 1546303600 1546303600, 2019-01-01 01:46:40 CET 1546303600, 2019-01-01 00:46:40 GMT 1556703600 1556703600, 2019-05-01 11:40:00 CEST 1556703600, 2019-05-01 09:40:00 GMT Actual result: -------------- date_default_timezone_set('UTC') 1546303600 1546300000, 2019-01-01 00:46:40 UTC 1546300000, 2019-01-01 00:46:40 GMT 1556703600 1556700000, 2019-05-01 09:40:00 UTC 1556700000, 2019-05-01 09:40:00 GMT date_default_timezone_set('Europe/Berlin') 1546303600 1546303600, 2019-01-01 01:46:40 CET 1546300000, 2019-01-01 00:46:40 GMT 1556703600 1556703600, 2019-05-01 11:40:00 CEST 1556700000, 2019-05-01 09:40:00 GMT ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=77840&edit=1