How can PHP be used to handle user authentication and password protection in a scheduling application?

To handle user authentication and password protection in a scheduling application using PHP, you can create a login system where users input their username and password. The passwords should be securely hashed before being stored in a database. When a user tries to log in, their entered password should be hashed and compared to the hashed password stored in the database. 

<?php

// Check if the form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Retrieve user input
    $username = $_POST["username"];
    $password = $_POST["password"];

    // Hash the password
    $hashedPassword = password_hash($password, PASSWORD_DEFAULT);

    // Check if the username and password match a record in the database
    // This is a simplified example, in a real application, you would query your database
    if ($username == "admin" && password_verify($password, $hashedPassword)) {
        // Authentication successful, redirect to the scheduling application
        header("Location: scheduling_app.php");
        exit();
    } else {
        // Authentication failed, display an error message
        echo "Invalid username or password";
    }
}
?>

<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <input type="text" name="username" placeholder="Username" required><br>
    <input type="password" name="password" placeholder="Password" required><br>
    <button type="submit">Login</button>
</form>

Keywords

PHP user authentication password protection scheduling application security

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