title: What is the curl error 52 "empty reply from server"?
body: <p>I have a cron job setup on one server to run a backup script in PHP that is hosted on another server.</p>
  <p>The command I've been using is</p>
  <pre><code>curl -sS http://www.example.com/backup.php
  </code></pre>
  <p>Lately I've been getting this error when the Cron runs:</p>
  <pre><code>curl: (52) Empty reply from server
  </code></pre>
  <p>If I go to the link directly in my browser the script runs fine and I get my little backup ZIP file.</p>