From: Operating system: Linux / Mac PHP version: 5.3.12 Package: Date/time related Bug Type: Bug Bug description:Adding DateInterval to DateTime adds 1 additional hour
Description: ------------ When I create a DateTime object from a (any) timestamp and then add a DateInterval object to the DateTime object, the time in the DateInterval object is added and one additional hour is also added. I have not noticed this behavior in versions up to and including 5.3.8, only in newer 5.3 versions. (I did not test in 5.4.) Also the behavior is related to the default time zone, even though the created DateTime object is in UTC. I have tested several timezones and it appears that all Europe/* and North American America/* timezones are affected. The Australian timezones seem to be unaffected. Information from phpinfo(): date - date/time support => enabled - "Olson" Timezone Database Version => 2012.3 - Timezone Database => internal Test script: --------------- date_default_timezone_set('Europe/Amsterdam'); $d1 = new DateTime('@0'); $d2 = clone($d1); $d2->add(new DateInterval('PT5S')); var_dump($d2); Expected result: ---------------- object(DateTime)[2] public 'date' => string '1970-01-01 00:00:05' (length=19) public 'timezone_type' => int 1 public 'timezone' => string '+00:00' (length=6) Actual result: -------------- object(DateTime)[2] public 'date' => string '1970-01-01 01:00:05' (length=19) public 'timezone_type' => int 1 public 'timezone' => string '+00:00' (length=6) -- Edit bug report at https://bugs.php.net/bug.php?id=61955&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=61955&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=61955&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=61955&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=61955&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=61955&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=61955&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=61955&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=61955&r=needscript Try newer version: https://bugs.php.net/fix.php?id=61955&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=61955&r=support Expected behavior: https://bugs.php.net/fix.php?id=61955&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=61955&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=61955&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=61955&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=61955&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=61955&r=dst IIS Stability: https://bugs.php.net/fix.php?id=61955&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=61955&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=61955&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=61955&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=61955&r=mysqlcfg