PHP sanitization question
<p>I was wondering how would you sanitize the $_SERVER['REQUEST_URI'], $_POST['email'] and $url code in the code snippets below using PHP.</p>

<p>I'm using PHP Version 5.2.14</p>

<p>Code Snippets.</p>

<pre><code>&lt;form method="post" action="&lt;?php $_SERVER['REQUEST_URI']; ?&gt;"&gt;
&lt;/form&gt;

$email = $_POST['email']; //Grabs the email address

$page_url = $url; //Grabs the pages url address.
</code></pre>
