title: Automatically calculate expiry date php
body: <p>In a site I am creating, I want to store member data and in that data I have a start/join date which is easy to get, but I want to automatically calculate the expiry date which I'm having problems with..</p>
  
  <p>Basically all new members will expire on the last day of February each year, so if I join on say 1st Feb 2013 my expiry will be on 28/02/2014, if I join on 1/03/13 or 20/12/13 my expiry will still be on 28/02/2014. ((I don't mind too much about the 1 day that appears on leap years))</p>
  
  <p>Does anyone know how I can work this out - I know it's probably something obvious but I just cant seem to grasp it! :/</p>
  
  <p>(I'll be doing this in php)</p>
  
  <p>Many thanks in advance,
  Chris</p>