title: $_POST vs. $HTTP_RAW_POST_DATA vs file_get_contents(php://input)?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/3173547/whats-the-difference-between-post-and-raw-post-in-php-at-all">What’s the difference between POST and raw POST in PHP at all?</a>  </p>
  </blockquote>
  
  
  
  <p>For a better understanding, I would be grateful if you would explain what are the fundamental differences between <strong>$_POST</strong>, <strong>$HTTP_RAW_POST_DATA</strong> and <strong>file_get_contents(php://input)</strong>.</p>
  
  <p>When to use which, and why?</p>