Bug #77072 [Opn->Nab]: DateInterval constructor should provide a way to construct a negative interval

Edit report at https://bugs.php.net/bug.php?id=77072&edit=1 ID: 77072 Updated by: derick@php.net Reported by: teo8976 at gmail dot com Summary: DateInterval constructor should provide a way to construct a negative interval -Status: Open +Status: Not a bug Type: Bug Package: Date/time related Operating System: all PHP Version: 7.3.0RC4 Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Previous Comments: ------------------------------------------------------------------------ [2019-02-11 19:25:54] duncan3dc@php.net It is actually possible to set the invert property when constructing with 2 dates: https://3v4l.org/v3KDQ So a second $invert argument on the constructor would be weird in this scenario. I don't think this should be added ------------------------------------------------------------------------ [2018-10-27 18:41:46] requinix@php.net ISO 8601's syntax does not support negative intervals so PHP shouldn't either, but the constructor could have a second $inverted=0 argument. ------------------------------------------------------------------------ [2018-10-27 17:24:01] teo8976 at gmail dot com 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 this bug report at https://bugs.php.net/bug.php?id=77072&edit=1