PHP Cookie and Pass values through Cookie
From w3cyberlearnings
Contents |
What is cookie in PHP?
- Cookie uses to pass information to the user browser.
- Cookie is unsecured because information in the cookie that pass to the user browser can be
changed.
- Cookie is stored in a specific location within the user computer.
- Ad that uses cookie to track user browser habits which against the user privacy.
- User can turn off his or her own cookie.
- Store information using Cookis is very unreliable because user can delete or alter the cookie
- Cookie information can not be access in the current page where the cookie has been set.
Where to place the cookie?
- Cookie must be placed on the top of page.
Cookie syntax
setcookie(name, value, expire, path, domain);
Cookie hour
// for 1 minute $expire1= time() + 60 ; // for 3minutes $expire2= time() + 60 * 3; // for 1 hour $expire2= time() + 60 * 60; // for 3 hour $expire2= time() + 60 * 60 * 3; // for 1 day (24 hours) $expire2= time() + 60 * 60 * 24; // for 2 days $expire2= time() + 60 * 60 * 24 * 2; // for a month $expire2= time() + 60 * 60 * 24 * 30; // for 2 months $expire2= time() + 60 * 60 * 24 * 30 * 2; // for 1 year $expire2= time() + 60 * 60 * 24 * 30 * 12;
Cookie syntax example 1
- This cookie expire within an hour after create.
setcookie('user', 'Bob Maat', time()+3600);
Cookie syntax example 2
- The same as the example 1.
$expire = time() + 60 * 60 * 24 ;
setcookie('user', 'Bob Maat', $expire);
Cookie syntax example 3
- Set cookie for a specific path and domain
$expire = time() + 60 * 60 * 24 ;
$path = '/student_list/';
$domain ='w3cyberlearnings.com';
setcookie('user', 'Bob Maat', $expire,$path, $domain);
Example 1
student.php page
- Set cookie.
- Place cookie on top of the page.
<?php
setcookie('name', 'Bob Maat', time() + 60);
session_start();
$_SESSION['authorized'] = 1;
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>All User</title>
</head>
<body>
<a href="student_list.php">Click Here</a>
</body>
</html>
student_list.php page
- Get user cookie information
<?php
session_start();
if ($_SESSION['authorized'] != 1) {
echo 'Sorry, you do not have permission!';
exit();
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>List User</title>
</head>
<body>
<?php
echo 'Student name: ' . $_COOKIE['name'] . '<br/>';
?>
</body>
</html>
