// Switch case to handle $page and the variable function call+associated value
switch($page) {
	case 'index':
		$func = 'getNews';
		$userFuncValue = 3;
		$altFuncValue = $_REQUEST['id'];
	break;
	case 'profile':
		$func = 'getProfile';
		$userFuncValue = $_SESSION['UserID'];
	break;
	case 'messages':
		$func = 'getMessages';
		$userFuncValue = $_SESSION['UserID'];
	break;
}

// Set vars from the called function to fill out the template.
$tpl->set_vars($func($userFuncValue, $altFuncValue));