Bug #53067 [NEW]: DateTime::add && DateTime::sub changes original dateTime object

From: Operating system: Windows PHP version: 5.3.3 Package: Date/time related Bug Type: Bug Bug description:DateTime::add && DateTime::sub changes original dateTime object Description: ------------ Documentation says it should return new Object thought it returns modified old. PHP 5.3.2 (cli) (built: Mar 3 2010 20:36:54) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies with Xdebug v2.1.0, Copyright (c) 2002-2010, by Derick Rethans Test script: --------------- $day_interval = new DateInterval('P1D'); $cur_date = new DateTime('2000-01-02'); echo $cur_date->add($day_interval)->format('Y-m-d'); echo $cur_date->sub($day_interval)->format('Y-m-d'); Expected result: ---------------- 2000-01-03 2000-01-01 Actual result: -------------- 2000-01-03 2000-01-02 -- Edit bug report at http://bugs.php.net/bug.php?id=53067&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=53067&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=53067&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=53067&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=53067&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53067&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=53067&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=53067&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=53067&r=needscript Try newer version: http://bugs.php.net/fix.php?id=53067&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=53067&r=support Expected behavior: http://bugs.php.net/fix.php?id=53067&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=53067&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=53067&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=53067&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=53067&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=53067&r=dst IIS Stability: http://bugs.php.net/fix.php?id=53067&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=53067&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=53067&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=53067&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=53067&r=mysqlcfg