Bug #77097 [NEW]: DateTime::diff gives wrong diff when the actual diff is less than 1 second

From: vishnunn at ymail dot com Operating system: CentOS Linux 7.5.1804 PHP version: 7.3.0RC4 Package: Date/time related Bug Type: Bug Bug description:DateTime::diff gives wrong diff when the actual diff is less than 1 second Description: ------------ --- From manual page: https://php.net/datetime.diff --- Test script: --------------- $now = new DateTime('2018-11-03 11:34:20.781751'); $ago = new DateTime('2018-11-03 11:34:20.000000'); $diff = $now->diff($ago); var_dump($diff); Expected result: ---------------- On PHPv7.2.11 it gives the correct output: Date/time in $now: 2018-11-03 11:34:20.781751 Date/time in $ago: 2018-11-03 11:34:20.000000 object(DateInterval)#574 (16) { ["y"]=> int(0) ["m"]=> int(0) ["d"]=> int(0) ["h"]=> int(0) ["i"]=> int(0) ["s"]=> int(0) ["f"]=> float(-0.781751) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(0) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } Actual result: -------------- On PHPv7.3RC4 it give this output which is wrong: Date/time in $now: 2018-11-03 11:50:50.826351 Date/time in $ago: 2018-11-03 11:50:50.000000 object(DateInterval)#574 (16) { ["y"]=> int(-1) ["m"]=> int(11) ["d"]=> int(30) ["h"]=> int(23) ["i"]=> int(59) ["s"]=> int(59) ["f"]=> float(0.173649) ["weekday"]=> int(0) ["weekday_behavior"]=> int(0) ["first_last_day_of"]=> int(0) ["invert"]=> int(0) ["days"]=> int(0) ["special_type"]=> int(0) ["special_amount"]=> int(0) ["have_weekday_relative"]=> int(0) ["have_special_relative"]=> int(0) } -- Edit bug report at https://bugs.php.net/bug.php?id=77097&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=77097&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=77097&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=77097&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=77097&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=77097&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=77097&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=77097&r=needscript Try newer version: https://bugs.php.net/fix.php?id=77097&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=77097&r=support Expected behavior: https://bugs.php.net/fix.php?id=77097&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=77097&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=77097&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=77097&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77097&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=77097&r=dst IIS Stability: https://bugs.php.net/fix.php?id=77097&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=77097&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=77097&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=77097&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=77097&r=mysqlcfg