Miscellany

class TController {	private $components = new array();	public function register(&$comp) { $components[] = $comp; }	public function getHeader() {		foreach ($components as $comp) {			$comp->getHeader();		}	}}interface Component {	public function getHeader()}class DropDown implements Component {	public function getHeader() {		include('ddHeader.php');	}}$controller = new TController();$dd = new DropDown();$controller->register($dd);<html><head>$controller->getHeader();</head>...