Using a query string of /?value instead of /?key=value
<p>I know the format for a query string is a <em>key</em> => <em>value</em> format like <code>/?key=rob</code>.</p>

<p>I am wondering if it is possible just to make the query string like <code>/?rob</code>, and I could still set <code>$_SESSION['username']</code> to the name value?</p>
