title: Adding X weeks to a date using PHP 5.2
body: <p>My shared hosting package at 1and1 only includes PHP 5.2.17 -- so I can't use the <code>DateTime</code> object. Very annoying!</p>
  
  <p>I currently have this code</p>
  
  <pre><code>$eventDate = new DateTime('2013-03-16'); // START DATE
  $finishDate = $eventDate-&gt;add(new DateInterval('P'.$profile["Weeks"].'W'));
  </code></pre>
  
  <p>But obviously it won't work.</p>
  
  <p>How can do I the same with code that will work with PHP5.2? (The code adds X number of weeks to a particular date.)</p>