Carbon::createFromFormat('Y-m-d', '0000-00-00') issue about carbon

Yes, you guessed right!

Anyway... is there any built-in isValid method?
Something to use in order to verify that a date is valid like:

$date = Carbon::createFromFormat('Y-m-d', '0000-00-00');
$date->isValid() ? $date->day : Carbon::now()->day;

Thanks

[briannesbitt]

You get the same thing if you do var_dump(DateTime::createFromFormat('Y-m-d', '0000-00-00')); which is the base implementation.

Since the valid month and day values are from 1 - 12 and 1 - 31 I think it is setting the month and day to current'ish values -1. So month is Dec - 1 ... ie Nov. Date is 0 which is invalid so its defaulted to 1 - 1 which would be Dec 1 - 1 ...ie 30. Same thing for year. Just guessing.

You get what you get when you pass in invalid parameters ?!?
http://php.net/manual/en/datetime.createfromformat.php

BTW, it throws an InvalidArgumentException if you do something really bad like Carbon::createFromFormat('Y-m-d', '0000-0-000');

[briannesbitt]

No. If you pass in an invalid date it will throw an InvalidArgumentException :-)

Your date is valid, not commonly used, but valid none the less. -0001 is just 1 year BC.

http://en.wikipedia.org/wiki/Gregorian_calendar#Proleptic_Gregorian_calendar
For dates before the year 1, unlike the proleptic Gregorian calendar used in the international standard ISO 8601, the traditional proleptic Gregorian calendar (like the Julian calendar) does not have a year 0 and instead uses the ordinal numbers 1, 2, … both for years AD and BC. Thus the traditional time line is 2 BC, 1 BC, AD 1, and AD 2. ISO 8601 uses astronomical year numbering which includes a year 0 and negative numbers before it. Thus the ISO 8601 time line is −0001, 0000, 0001, and 0002.