class htmlConstructor {
	function init ( $lang = "" ) {
		echo "<html" . (strlen($lang) ? " lang='" . htmlentities($lang) . "'" : "") . ">\n";
	}
	
	function contHead ( $contenido = "" ) {
		echo "<head>\n" . $contenido . "\n</head>\n";
	}
	
	function title ( $titulo = "" ) {
		echo "\t<title>" . htmlentities($titulo) . "</title>\n";
	}
	
	function end () {
		echo "\n</html>";
	}
}

	
	$html = new htmlConstructor();
	
	$html->init();
	$html->contHead(
		$html->title("This is a title");
	);

	$html->end();