title: get exact os detail using codeigniter useragents
body: <p>I want to get exact info of which os user is login for this I am using codeigniter useragent library </p>
  
  <pre><code>$this-&gt;load-&gt;library('user_agent');
  echo $this-&gt;agent-&gt;platform(); die;
  </code></pre>
  
  <p>but it shows me <strong>Unknown Windows OS</strong> when I login using window is there any other way to get exact operating system</p>