Unassigning a variables value from $_GET
<p>I use;</p>

<pre><code>$referrer = $_GET['_url'];
</code></pre>

<p>If I <code>echo $referrer;</code> it will display correctly.</p>

<p>If I use $referrer within a $_POST, it is empty. I think due to $referrer being assigned to $_GET.<br>
How can I extract the <em>value of $referrer</em> into another variable so it is no longer assigned to the $_GET?  </p>

<p>I hope that makes sense..</p>
