setting cookie in php.php

<?php
//For testing I have set it 60 sec
setcookie("visited",true,time()+86400*365*10); //No need to to change here.

if(!isset($_COOKIE['visited']))
	setcookie("visited_5min",true,time()+60); //When 5 mins change it as time()+60*5
	
if(!isset($_COOKIE['visited']) && !isset($_COOKIE['visited_5min']))
	$popup_time = 1000*60; //When 5 mins, change it as 1000*60*5
	elseif(isset($_COOKIE['visited']) && isset($_COOKIE['visited_5min']))
		$popup_time = 1000*60; //When 5 mins, change it as 1000*60*5
			elseif(isset($_COOKIE['visited']) && !isset($_COOKIE['visited_5min']))
				$popup_time = 0;
				
?>