Stuff

<?phpclass parse_AR(){	function parse(&$data)	{		//do stuff to $data based on AR rules	}}class parse_AP(){	function parse(&$data)	{		//do stuff to $data based on AP rules	}}switch ($filename){	case "ar";		$parser = new parse_AR();		break;	case "ap";		$parser = new parse_AP();		break;	default:		die("unsupported file");}$f = fopen(...);while(...){	$data = ....	....	$parser->parse($data);}fclose...?>