What are the common mistakes made when implementing password-based redirection in PHP scripts?

Common mistakes when implementing password-based redirection in PHP scripts include storing passwords in plain text, not hashing passwords before comparing them, and not using secure HTTPS connections to transmit passwords. To solve these issues, passwords should be securely hashed before storing and comparing them, and HTTPS should be used to encrypt password transmissions.

// Hash the password before storing it
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Compare hashed password with user input
if (password_verify($input_password, $hashed_password)) {
    // Redirect user to the desired page
    header("Location: secret_page.php");
    exit();
} else {
    // Handle incorrect password
    echo "Incorrect password";
}