Password verify - PDO

pytanie zadane 22 października 2015 w PHP przez Maksymilian Sadowski Nowicjusz (140 p.)

Witam, zaczalem uzywac PDO, za pomoca ktorego probuje stworzyc system do logowania. Kod wyglada tak:

<?php
session_start();

require_once 'db/connect.php';
include 'inc/header.php';

if(isset($_POST['submit'])){
    $username = !empty($_POST['username']) ? trim($_POST['username']) : null;
    $password = !empty($_POST['password']) ? trim($_POST['password']) : null;

        $records = $db->prepare("SELECT * FROM USER WHERE USERNAME = :USERNAME");
        $records->bindValue(':USERNAME', $username);
        $records->execute();
        $results = $records->fetch(PDO::FETCH_ASSOC);
        if($results === false) {
            die("Incorrect username/password combination!");
        }else{
            $validPassword = password_verify($password, $results['password']);

            if($validPassword){
                $_SESSION['username'] = $username["username"];
                $_SESSION['logged_in'] = time();

                echo "Success";
                exit;
            }else {
                die("Incorrect username/password combination!");
            }
        }
}
?>
<div class="row feed">
    <div class="col-lg-6 col-lg-offset-3">
        <div id="register">
            <h2>Login</h2>
            <form action="login.php" method="post">
                Username: <br><input type="text" name="username"><br>
                Password: <br><input type="password" name="password"><br>
                <br>
                <input type="submit" value="Login" name="submit"/>
            </form>
        </div>

Niestety nie wiem dlaczego ale linia:

$validPassword = password_verify($password, $results['password']);

Daje mi error
Notice: Undefined index: password in C:\XAMPP\htdocs\web3\login.php on line 32

Co moze byc problemem? Kazda podpowiedz jest na wage zlota. Pozdraiwam