ISSET and GET in PHP
<p>Is this an efficient way of converting the url ?p=XX to displayed content?</p>

<p><code>&lt;?php if (isset($p[include ($_GET['p'] . '.php')])) ?&gt;</code></p>

<hr>

<p>Other bonus question:</p>

<p>I'm using xampp, why cant I use the <code>&lt;?</code> or <code>&lt;?=</code> tags rather than <code>&lt;?php</code> and <code>&lt;?php echo</code> respectively.</p>
