Hello,
You want to look into the 'date' and 'mktime' functions, specifically combinations of the two. try here:
http://php.net/manual/function.date.php
http://php.net/manual/function.mktime.php
From the PHP manual for date() :
$tomorrow = mktime (0,0,0,date("m") ,date("d")+1,date("Y"));
$lastmonth = mktime (0,0,0,date("m")-1,date("d"), date("Y"));
$nextyear = mktime (0,0,0,date("m"), date("d"), date("Y")+1;
So, try something like this:
$newdate = mktime(0,0,0,date("m"),date("d") +30,date("Y"));
Hope this helps,
Ross
ross@activestudios.net