title: How to execute a php header script from javascript?
body: <p>I have the following script <code>validation.php</code></p>
  
  <pre><code>&lt;?php
  if(!isset($_SESSION['userId'])){
      session_destroy();
      header('Location: home.php');
      exit;    
  }
  ?&gt;
  </code></pre>
  
  <p>I would like to execute this script every time someone clicks a button in the <code>#main-display</code></p>
  
  <pre><code>$("#main-display").on('click', 'button', function (event){
      //some code in here
  });
  </code></pre>
  
  <p>How would I go about doing this?  </p>