[PHP-BUG] Bug #77072 [NEW]: DateInterval constructor should provide a way to construct a negative interval

From:             teo8976 at gmail dot com
Operating system: all
PHP version:      7.3.0RC4
Package:          PHP Language Specification
Bug Type:         Bug
Bug description:DateInterval constructor should provide a way to construct a negative interval

Description:
------------
A DateInterval object can represent negative intervals, when its $invert
property equals 1.

However, there's no way (or no documented way) to construct a
DateInterval object that is inverted with the constructor.

Yoy need to do:
  $interval = new DateInterval("whatever"); 
  $interval->inverted = 1;

It's absolutely ridiculous and pathetic that there exist values that can
be represented by the class but cannot be created with the constructor.


The interval_spec should support a way to specify inverted intervals.
Any of these would be fine, it's just a matter of taste:
- prefix the interval with a "-" (minus) sign
  e.g. "-P1Y3D"
- a "-" (minus) sign after the initial P
  e.g. "P-1Y3D"
- some suffix at the end, for example "I" for "Inverted"
  e.g. "P1Y3DN"


-- 
Edit bug report at https://bugs.php.net/bug.php?id=77072&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=77072&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=77072&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=77072&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=77072&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=77072&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=77072&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=77072&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=77072&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=77072&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=77072&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=77072&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=77072&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=77072&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77072&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=77072&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=77072&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=77072&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77072&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=77072&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=77072&r=mysqlcfg