Site.php
<?php

class Site {
	// General Site Information
	/** Site name. */
	public $name;
}

?>

Framework.php
<?php

require_once("config/Config.php");

require_once("core/Site.php");
global $site;
$site = new Site();
$site->name = Config::$siteName;
?>

Page.php
<?php

require_once("../Framework.php");

class Page {
	private $title = $GLOBALS["site"]->name;
	// more junk
}
?>