How to detect if the call is made through jQuery
<p>I use </p>

<p><code>$.post('ajax/test.php', function(data) {
  $('.result').html(data);});</code></p>

<p>to send data and retrieve information and show it to the user. But "hackers" can access my file (test.php) just typing it in URL. Is it possible to detect if the call is made from jQuery or not?</p>
