start date expiry date

[hasuplus]

Hello
i have a filed of duration
$duration=9
now start date is $sdate=12/04/2001
when i add the $duration in this then expiry date should be $exdate=12/01/2002 this is possible by looong coding is there some one familar with any function for this .
Thanks
Hasu

[matto]

you want to add months to a date?

see mktime, date, time and the functions around for date/time calculations.

[hasuplus]

i use mktime and other function all add a month but the problem is some thing like this

$sdate=22/7/2001
after addition of 7 months it should be
#edate=22/2/2002

but using mktime and othe avaialbe function give the result
22/14/2001

any solution