What are common tasks that can be accomplished using PHP, such as creating a login area, form mailer, counter, guestbook, and toplist?

Issue: Creating a login area using PHP allows users to securely access restricted content on a website. 

// PHP code for creating a login area
<?php
session_start();

if(isset($_POST['submit'])){
    $username = $_POST['username'];
    $password = $_POST['password'];

    // Check if username and password are correct
    if($username == 'admin' && $password == 'password'){
        $_SESSION['loggedin'] = true;
        header('Location: dashboard.php');
        exit;
    } else {
        echo 'Invalid username or password';
    }
}
?>

<form method="post" action="">
    <input type="text" name="username" placeholder="Username"><br>
    <input type="password" name="password" placeholder="Password"><br>
    <input type="submit" name="submit" value="Login">
</form>

Keywords

PHP login area form mailer counter guestbook toplist

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