Redirect with manipulating get parms php
<p>what's the best practice for manipulating a request and redirect it?</p>

<p>example -</p>

<p>user goes to <code>www.mysite.com?s=1&amp;b=2</code></p>

<p>I want to redirect to</p>

<pre><code>www.mysite.com?s=1&amp;b=2&amp;c=3
</code></pre>
