Bug #66294 [NEW]: Timezone display and Timestamps are incorrect when using GMT+/- timezones

From: jrossiter at dlvr dot it Operating system: Ubuntu 13.04 PHP version: 5.5.7 Package: Date/time related Bug Type: Bug Bug description:Timezone display and Timestamps are incorrect when using GMT+/- timezones Description: ------------ Creating a new DateTime object using a fixed string with a "GMT(+/-)nn" timezone (e.g. "GMT+12" or "GMT-10") results in the correct date and time being displayed, with but a badly formatted timezone ("GMT+1200", "GMT-1000") (A note if the reader isn't aware... the Etc/GMT timezones actually perform the opposite of what they appear to be requesting. GMT+12 is actually GMT minus 12 hours, and GMT-10 is actually GMT plus 10 hours) The unix timestamp returned by this object is incorrect by 2*offset. So, the GMT+12 returns a timestamp decremented 24 hours. The GMT-10 returns a date/time incremented by 20 hours. Creating a new DateTime object and passing in a DateTimeZone object using an Etc/GMT(+/-)nn (e.g. "Etc/GMT+12") timezone displays timestamps and formatted timezone as expected. Test script: --------------- foreach (['Etc/GMT+12', 'Etc/GMT-10'] as $timezone) { $dTZ = new DateTimeZone($timezone); // Create a DateTime using the DateTimeZone object // This will display both formatted and unix timestamp as expected $dT = new DateTime('2013-12-13 18:49:00', $dTZ); echo $dT->format('Y-m-d H:i:s T'), PHP_EOL; echo $dT->getTimestamp(), PHP_EOL; // Create a DateTime using only a string representation // This will display the formatted date/time as expected, // but with the incorrect timezone // The value returned by getTimestamp() for format('U') will // be off by 2*offset $dT2 = new DateTime($dT->format('Y-m-d H:i:s T')); echo $dT2->format('Y-m-d H:i:s T'), PHP_EOL; echo $dT2->getTimestamp(), PHP_EOL, PHP_EOL; } Expected result: ---------------- 2013-12-13 18:49:00 GMT+12 1387003740 2013-12-13 18:49:00 GMT+12 1387003740 2013-12-13 18:49:00 GMT-10 1386924540 2013-12-13 18:49:00 GMT-10 1386924540 Actual result: -------------- 2013-12-13 18:49:00 GMT+12 1387003740 2013-12-13 18:49:00 GMT+1200 1386917340 2013-12-13 18:49:00 GMT-10 1386924540 2013-12-13 18:49:00 GMT-1000 1386996540 -- Edit bug report at https://bugs.php.net/bug.php?id=66294&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66294&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66294&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66294&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66294&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66294&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66294&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66294&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66294&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66294&r=support Expected behavior: https://bugs.php.net/fix.php?id=66294&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66294&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66294&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66294&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66294&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66294&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66294&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66294&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66294&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66294&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66294&r=mysqlcfg