[PHP] Week numbers

[Davíð Örn Jóhannsson]

Lets say I have a date: 29.10.2002 and I want to be able to find out
what week number it is, I know
how to find out what the current week number is: date(“W”) to day it
would result 44, but i need to be 
able to  do this dynamically ofcourse, any Ideas?
 
thanks, David