-- HomePage.php

<?php

class HomePage extends Page
{

}

class HomePage_Controller extends Page_Controller
{
	public function UserConstants()
	{
		return get_defined_constants()['user'];
	}
}

-- HomePage.ss

<div class="content-container unit size3of4 lastUnit">
	<article>
		<h1>$Title</h1>
		<% loop $UserConstants %>
			<p>Key: ? - Value = ?</p>
		<% end_loop %>
		<div class="content">$Content</div>
	</article>
		$Form
		$PageComments
</div>