I tried to create a button which removes existing cookies and saves other data using this
<?php session_start(); ?>
<html>
<head>
<title>Reading Cookies</title>
</head>
<body>
<?php // Reading the value of a cookie
// give $var1 a default value
$var1 = 'cookie not set';
$var2 = 'unspecified';
// if cookie with name 'test' exists then set $var1 to its value
if (isset($_COOKIE['id'],$_COOKIE['usr'])) {
$var1 = $_COOKIE['id'];
$var2 = $_COOKIE['usr'];
}
echo "id= {$var1}<br/>usr= {$var2}";
?>
<?php // Deleting a cookie
// set cookie value to 0 and expiration to the distant past
if(isset($_GET['logout'])) {
setcookie('usr', null, time()-(60*60*24*7));
setcookie('id', null, time()-(60*60*24*7));
$_SESSION['first_name'] = "aa";
$_SESSION['last_name'] = "bb";
}
?>
<br/>
<a href="?logout">logout</a>
</body>
</html>
but when I try to access the first_name and last_name valus via other page
<?php session_start();
// read values from the session
$name = $_SESSION['first_name'] . " " . $_SESSION['last_name'];
echo $name;
?>
it displays error undefined index first_name
