Bug #73097 [NEW]: strftime %G does not work in some cases

From: dmanye at gmail dot com Operating system: linux PHP version: Irrelevant Package: Date/time related Bug Type: Bug Bug description:strftime %G does not work in some cases Description: ------------ strftime(%G) for Jan 1st 2017 returns 2016 instead of 2017. trying with other years works as expected (2013..2015 and 2018..2020) but others do not (2005, 2006, 2010..2012, 2016, 2017). these lists are not exhaustive. tested on 7.0.10 and 5.6.7 php versions. the date function works as expected. here's a second 19-line script that looks for the first January day where %G works as expected: ----------------- <?php echo "php version: " . phpversion() . "\n"; for ($year=1970;$year<2030;$year++) { $day = 1; $seconds = mktime(0,0,0,1,$day,$year); while ( strftime("%G",$seconds) != $year ) { $day ++; $seconds = mktime(0,0,0,1,$day,$year); } if ($day == 1) echo "$year: ok\n"; else echo "$year: it is not $year until " . strftime("%c",$seconds) . "\n"; } ---------------------------------- thanks. Test script: --------------- <?php echo "php version: " . phpversion() . "\n"; $seconds = mktime(0,0,0,1,1,2017); echo "seconds from epoch: $seconds\n"; echo "strftime(%G): " . strftime("%G",$seconds) . "\n"; echo "strftime(%c): " . strftime("%c",$seconds) . "\n"; echo "date(Y) : " . date("Y",$seconds) . "\n"; ?> Expected result: ---------------- php version: 7.0.10-1 seconds from epoch: 1483225200 strftime(%G): 2017 strftime(%c): Sun Jan 1 00:00:00 2017 date(Y) : 2017 Actual result: -------------- php version: 7.0.10-1 seconds from epoch: 1483225200 strftime(%G): 2016 strftime(%c): Sun Jan 1 00:00:00 2017 date(Y) : 2017 -- Edit bug report at https://bugs.php.net/bug.php?id=73097&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73097&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73097&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73097&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=73097&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=73097&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=73097&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=73097&r=needscript Try newer version: https://bugs.php.net/fix.php?id=73097&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=73097&r=support Expected behavior: https://bugs.php.net/fix.php?id=73097&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=73097&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=73097&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=73097&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73097&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=73097&r=dst IIS Stability: https://bugs.php.net/fix.php?id=73097&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=73097&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=73097&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=73097&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=73097&r=mysqlcfg