<?php

	#abstract because it should only be extended, not instantiated
	
	abstract class Controller
	{
		protected $registry; # protected so that it is accessible from other classes as well.
		
		function __construct($registry)
		{
			$this->registry = $registry;
		}

		# all controllers must contain an index method
		abstract function index();

		protected function redirect($url)
		{
			header('LOCATION: ' . html_entity_decode($url));
			exit();
		}
		
	}

?>