This tutorial will give you an idea on how to use the stored cookie to log in, and I’ve added a “logout” function that destroys both session and cookie.
Creating a Database
First, we’re going to create a database that contains our data.
1. Open phpMyAdmin.
2. Click databases, create a database and name it as “cookie”.
3. After creating a database, click the SQL and paste the below code. See image below for detailed instruction.
CREATE TABLE `user` ( `userid` INT(11) NOT NULL AUTO_INCREMENT, `username` VARCHAR(30) NOT NULL, `password` VARCHAR(30) NOT NULL, `fullname` VARCHAR(60) NOT NULL, PRIMARY KEY (`userid`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Inserting Data into a Database
Next, we insert users into our database. This will be our reference when we login.
1. Click the database the we created earlier.
2. Click SQL and paste the code below.
INSERT INTO `user` (`username`, `password`, `fullname`) VALUES
('neovic', 'devierte', 'neovic devierte'),
('lee', 'ann', 'lee ann');
Creating a Connection
Next step is to create a database connection and save it as “conn.php”. This file will serve as our bridge between our form and our database. To create the file, open your HTML code editor and paste the code below after the tag.
<?php
$conn = mysqli_connect("localhost","root","","cookie");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
?>
Creating a Login Form
Next is to create our login form. In this form, I’ve added a code that if ever there’s a cookie stored, it will show in the login inputs. To create the form, open your HTML code editor and paste the code below after the tag. We name this as “index.php”.
<?php
session_start();
include('conn.php');
?>
<!DOCTYPE html>
<html>
<head>
<title>Login Using Cookie with Logout</title>
</head>
<body>
<h2>Login Form</h2>
<form method="POST" action="login.php">
<label>Username:</label> <input type="text" value="<?php if (isset($_COOKIE["user"])){echo $_COOKIE["user"];}?>" name="username">
<label>Password:</label> <input type="password" value="<?php if (isset($_COOKIE["pass"])){echo $_COOKIE["pass"];}?>" name="password"><br><br>
<input type="checkbox" name="remember"> Remember me <br><br>
<input type="submit" value="Login" name="login">
</form>
<span>
<?php
if (isset($_SESSION['message'])){
echo $_SESSION['message'];
}
unset($_SESSION['message']);
?>
</span>
</body>
</html>
Creating a Login Success Page
Next, we create a go to page if login is successful. This page will show the user that login successfully. We name this page as “success.php”. In this page, I’ve added the logout link to destroy both session and cookie.
<?php
session_start();
if (!isset($_SESSION['id']) ||(trim ($_SESSION['id']) == '')) {
header('index.php');
exit();
}
include('conn.php');
$query=mysqli_query($conn,"select * from user where userid='".$_SESSION['id']."'");
$row=mysqli_fetch_assoc($query);
?>
<!DOCTYPE html>
<html>
<head>
<title>Setting Up Cookie on User Login</title>
</head>
<body>
<h2>Login Success</h2>
<?php echo $row['fullname']; ?>
<br>
<a href="logout.php">Logout</a>
</body>
</html>
Creating a Logout Script
Last is our logout script. This script destroys both our session and cookie then redirect us back to our login page. We name the script as “logout.php”.
<?php
session_start();
session_destroy();
if (isset($_COOKIE["user"]) AND isset($_COOKIE["pass"])){
setcookie("user", '', time() - (3600));
setcookie("pass", '', time() - (3600));
}
header('location:index.php');
?>
Happy Coding!
Download Here
Thanks for the code.