These functions allow you to get the date and time from the server
where your PHP scripts are running. You can use these functions to format the
date and time in many different ways.
Please keep in mind that these functions are dependent on
the locale settings of your server. Make sure to take
daylight saving time (use e.g.
$date = strtotime('+7 days', $date) and not
$date += 7*24*60*60)
and leap years into consideration when working
with these functions.