title: removing parameters from url
body: <p>i want to remove a parameter after the true url then redirection to the same url without this parameter</p>
  
  <p>example :</p>
  
  <p>i want to remove the parameter "r" from</p>
  
  <pre><code>http://www.mysite.com/123.html?r=1
  </code></pre>
  
  <p>and redirection to</p>
  
  <pre><code>http://www.mysite.com/123.html
  </code></pre>
  
  <p>using htaccess and 301 redirect</p>
  
  <p>thank you</p>