How to convert this date to Y-m-d (PHP)?

Question

I have this date as a string: 10.21.2011, the format is mm.dd.yyyy

How can I convert this to Y-m-d? This is what I tried, but it always gives me the 1970 date.

$date = date('Y-m-d', strtotime($date));

Thanks!

Answer 1

The object-oriented way:

$date = DateTime::createFromFormat('m.j.Y', '10.21.2011');
echo $date->format('Y-m-d');

My opinion is that this is the approach one should try to learn with PHP.

Requires PHP 5.3.

Answer 2

Most likely because of period .:

$date = '10.21.2011';
echo date('Y-m-d', strtotime(str_replace('.', '/', $date)));

Result:

2011-10-21