title: Complex business logic in WordPress
body: <p>The question: from a programming point of view, does WordPress allow a similar kind of flexibility that I would get by writing my own Java EE system? E.g. if the site owners suddenly decided that users whose birthday was on a Wednesday had to be sent a notification email and their birthday event had to be entered into a calendar that other members of the site could then RSVP to and then give a star rating afterwards to say how much they enjoyed it... could I do that easily with WP? </p>
  
  <p>Hope that's clear, really welcome any feedback. </p>