title: Run PHP function every month
body: <p>I need to run a PHP function every month that checks Tor Exit Nodes, I have the function, but I'm not sure how to run it every month.</p>
  
  <p>Here's the function:</p>
  
  <pre><code>$list = "http://some-tor-list.com/torlist/";
  $tor = file_get_contents($list);
  </code></pre>