<?php

	if ( isset($_COOKIE["visited"])) {
		$count = $_COOKIE["visited"] + 1;
	} else {
		$count = 1;
	}

	if ( $count > 3 ) {
		setcookie("visited", $count, time()-1800 );
	} else {
		$flag = setcookie("visited",$count );
	}

	...
	
	print('訪問回数は'.$count.'回目です。');

	?>