Converting php date to fit mysql database

Question

I want to convert an input date in the form of dd/mm/yyyy to the MySQL format which is yyyy-mm-dd.
I was trying to use date('Y-m-d', strtotime($_POST['date'])) but the problem is that the output is always Y-d-m, I think because it considers my 2nd argument to be mm/dd/yyyy.

How do I solve that?

Answer 1

date('Y-m-d', strtotime(str_replace('/', '-', $_POST['date'])))