datetime_format.php

<?php 
function datetimeFormat( $date, $format )
{
    $date = explode('-', $date);
    $day = explode(' ', $date[2]);
    $time = explode(':', $day[1]);
    $day = $day[0]; 

    $mktime = mktime($time[0] , $time[1], $time[2], $date[1], $day, $date[0]); 

    return date($format, $mktime);
}
?>