Question

I want to save this date format into my DB 20/07/2012 22:10 in a UNIX format.
How can I do this, and how can I revert it to a readable format?

Answer 1

I believe you are looking for on of two possible variants.

//save it
$timestamp = strtotime('20/07/2012 22:10');
$timestamp = mktime(22, 10, 0, 20, 7, 2012); //mktime(h,m,s,M,D,Y)

//retrieve it with
while ($rows = /*...*/) { 
    $timestamp = date("D/M/Y g:i",$rows['timestamp']);
}