<?php
    $cookie_var = "username";
    $cookie_val = "admin";
    setcookie($cookie_var, $cookie_val, time()+(86400*10), "/"); //86400 (setting for 10 days)
?>

<html>
<body>
<?php
    if(!isset($_COOKIE[$cookie_var])) 
    {
        echo "Cookie is not set";
    }
    else {
        echo "Cookie " .  $cookie_var . " value is: " . $_COOKIE[$cookie_var]; 
    }
?>
</body>
</html>