#48232 [NEW]: date_modify miscalculates forward from end of month

From: vqkq7ov02 at sneakemail dot com Operating system: Linux PHP version: 5.2.9 PHP Bug Type: Unknown/Other Function Bug description: date_modify miscalculates forward from end of month Description: ------------ When date_modify() is given the last day of a month and asked to add one weekday (e.g. +1 Sunday), if the last day of the month is that same weekday, then date_modify() doesn't add a week-- it returns the same date it was given. This problem occurs in PHP 5.2.9. It doesn't occur in PHP 5.2.6, which returns the correct result. Reproduce code: --------------- <?php echo "PHP Version = ", phpversion(), "\n"; $dt = new DateTime(); date_date_set($dt, 2009, 5, 31); echo 'Before date_modify: ', $dt->format('l m/j/y'), "\n"; $action = "+1 Sunday"; date_modify($dt, $action); echo "After date_modify ($action): ", $dt->format('l m/j/y') , "\n", "Should be Sunday 6/7/09\n"; ?> Expected result: ---------------- PHP Version = 5.2.6-3ubuntu4.1 Before date_modify: Sunday 05/31/09 After date_modify (+1 Sunday): Sunday 06/7/09 Should be Sunday 6/7/09 Actual result: -------------- PHP Version = 5.2.9-2 Before date_modify: Sunday 05/31/09 After date_modify (+1 Sunday): Sunday 05/31/09 Should be Sunday 6/7/09 -- Edit bug report at http://bugs.php.net/?id=48232&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=48232&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=48232&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=48232&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=48232&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48232&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=48232&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=48232&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=48232&r=needscript Try newer version: http://bugs.php.net/fix.php?id=48232&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=48232&r=support Expected behavior: http://bugs.php.net/fix.php?id=48232&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=48232&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=48232&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=48232&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48232&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=48232&r=dst IIS Stability: http://bugs.php.net/fix.php?id=48232&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=48232&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=48232&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=48232&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=48232&r=mysqlcfg