<?php
$visitCounter = 0;
if(isset($_COOKIE["visitCounter"])){
    $visitCounter = $_COOKIE["visitCounter"];
}
$visitCounter++;
if(isset($_COOKIE["lastVisit"])){
	$lastVisit = $_COOKIE["lastVisit"];
}
setcookie("visitCounter", $visitCounter, 0x7FFFFFFF);
setcookie("lastVisit", date("d-m-Y H:i:s"), 0x7FFFFFFF);
?>
<doctype html>
<html>
<head>
<title>Cookie-lab1</title>
<meta charset="utf-8">
</head>
<body>
	<?php
		if($visitCounter == 1){
			echo "<h1>Welcome!</h1>";
		}else{
			echo "<h1>Вы пришли $visitCounter-раз. Последнее посещение $lastVisit</h1>";
		}
	?>
</body>
</html>