[false-positive] 'type unsafe comparison' on DateTime objects

[b1rdex]

$date1 = '2016-11-02';
$date2 = '2016-11-02';
(new DateTime($date1)) == (new DateTime($date2))

You can't check DateTime equality, but php allows them to compare using ==, > and <.

[dryabov]

I've checked php sources, there are special comparators for Closure, DateTime, DateTimeImmutable, IntlBreakIterator, IntlTimeZone, PDO, PDOStatement, ArrayObject, and SplObjectStorage classes (search for ".compare_objects" string).

[dryabov]

And most likely classes extending above ones have the same comparators (but it should be checked, seems it is not explained in docs).

[kalessil]

@dryabov : huge thanks for your research, PHP is keeping to surprise me.

[Rarst]

I've noticed "type unsafe comparison" showing up on DateTime objects as of right now, had this regressed since or something?

[kalessil]

@Rarst: would you please create a new issue for your case?