How to understand the type of a request?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3124636/detect-ajax-calling-url">Detect Ajax calling URL</a>  </p>
</blockquote>



<p>is it possible to understand if a request is sent using ajax(xhr) from a server side language like php? I should know if the request is sent from a "normal page" or from an ajax call... is it possible without passing arguments(querysring) to the .php page?</p>
