title: How can I parse and echo CGI query string parameters?
body: <p>I would like to execute a command on the server by using the system request parameters in the URL. I am running the server.</p>
  
  <p>In the browser ->> <code>//localhost:9009/?comd</code> which is displaying the list of files in the directory as i placed in the code</p>
  
  <pre><code>if (/comd/i )        { print  $client `dir`;      }
  </code></pre>
  
  <p>How I can parse the request parameters? For example:</p>
  
  <p><code><a href="http://localhost:9009/?comd" rel="nofollow noreferrer">http://localhost:9009/?comd</a><B>&amp;user=kkc&amp;mail=kkc@kkc.com</B></code></p>
  
  <p>I would like to return -->> <code>hello <B>user</B> please confirm your email <B>kkc@kkc.com</B></code></p>
  
  <p>How can I parse the request parameters in the url?</p>