title: How to enable php intl
body: <p>I'm on Ubuntu 17.10
  PHP Version: 7.1</p>
  
  <p>I already tried this:</p>
  
  <pre><code>sudo apt-get install php7.1-intl
  sudo service apache2 restart
  </code></pre>
  
  <p>But when I var_dump <code>extension_loaded('intl')</code> it returns false. How can I enable this mod?</p>