Convert US date format to ANSI SQL date format (YYYY-mm-dd)

Question

I want to convert user-submitted date format (mm/dd/yyyy) to a MySQL date format (YYYY-mm-dd). Submission is via a simple PHP form direc tto MySQL database.

Answer 1

An alternative method as of PHP 5.2

$datetime = new DateTime($user_date);
echo $datetime->format('Y-m-d H:i:s');

DateTime is Y38k and timezone friendly.