title: can I add "&" as in value of one field
body: <p>I asked how can I add "&amp;" in value of one of the params
  for example</p>
  
  <pre><code>www.example.com/index.php?param1=m&amp;c&amp;param2=value2
  </code></pre>
  
  <p>It this possible ?</p>
  
  <p>I need to get it by the query_str() as
  param1=m&amp;c
  param2=value2</p>