title: file_get_contents('php://input') returning empty string with a PATCH request
body: <p>My environment is PHP 5.5.9, Nginx 1.4.6-1ubuntu3.2, localhost.</p>
  
  <p>I'm trying to get data from PATCH method, but that just return an empty string...
  With POST method that's work fine, this is a piece of my script :</p>
  
  <pre><code>case 'POST':
  case 'PATCH':
       $this-&gt;data = file_get_contents("php://input");
  </code></pre>
  
  <p>$this->data is empty when PATCH method is used and complete when POST, i use the POSTMAN chrome extension and i push RAW data (not multipart/form-data)</p>
  
  <p>I think Nginx was in fault...but nothing into the log file...</p>
  
  <p>Any help will be much appreciated !</p>