What are some common features of a PHP script for user account creation and login?

Common features of a PHP script for user account creation and login include forms for users to input their information, validation of user input to ensure it meets requirements, secure storage of user credentials (usually hashed passwords), and authentication mechanisms to verify user identity during login. 

// User account creation script
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate user input
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    // Hash the password before storing it
    $hashed_password = password_hash($password, PASSWORD_DEFAULT);
    
    // Store the user information in a database
    // Insert query to add user to database
}

// User login script
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate user input
    $username = $_POST['username'];
    $password = $_POST['password'];
    
    // Retrieve user information from the database based on the username
    // Compare the hashed password with the input password using password_verify
    if ($user && password_verify($password, $user['password'])) {
        // User authenticated, set session variables or cookies for login
    } else {
        // Invalid credentials, display error message
    }
}

Keywords

PHP user account creation login authentication password hashing

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