title: How to get date from week number & day number and year?
body: <p>I'm trying to get the date from the week number, day number and year.</p>
  
  <p>For eg:</p>
  
  <pre><code>week number = 52   
  day number = 4 (of week 52)  
  year = 2013  
  </code></pre>
  
  <p>In this case, the date should be <code>26-12-2013</code>.</p>
  
  <p>How can I do it using PHP? I've already tried with <code>strtotime()</code>, but I'm confused about the formats. Can someone help?</p>